regional center of worship for a god called (Re)-Atum. Its only remnant evidence is the Al-Masalla Obelisk.
Heliopolis and the worship of Atum both feature in Scripture.
Heliopolis, with its pillars/obelisks, is judged for its idolatry in Jeremiah 43:13 (He shall break the obelisks of Heliopolis, which is in the land of Egypt, and the temples of the gods of Egypt he shall burn with fire.) and Isaiah 19:18.
The Egyptian name of Heliopolis is ‘Iunu’ meaning ‘pillar’ (or obelisk).
In Coptic it is ‘On’, which is judged in Ezekiel 30:17. Joseph’s wife is the daughter of Potiphera (whose name means ‘the one whom Ra has given’ and is a “priest of On” (Genesis 41:45, 50; 46:20). So 
Potiphera likely worshipped Re-Atum. Also, Israelite slaves built grain-stores for Pharaoh at ‘Pithom’ (Exodus 1:11) which in Egyptian means ‘Great House of Atum’ (pr-jtm.w).
Atum’s name appears in Egypt’s oldest texts, inscribed on walls and
corridors of burial chambers inside 5th Dynasty pyramids. He is
described as the first creator god, who emerged from ‘primordial flood
waters’, ascended the ‘primordial mound’ (the first land) and initiated
his work of creation.
Atum creates two children by ‘sneezing’ or ‘spitting out’ a son, Shu
(representing air), and a daughter, Tēfnut (moisture). From Atum, other
gods were believed to have descended by natural procreation. Thus the
Egyptians thought in terms of nine (sometimes ten) gods, jointly called
the Great Ennead.
The 19th Dynasty Turin Canon (or Turin King List) papyrus
lists rulers of Egypt and their reign-lengths. Though highly damaged, it
features names from the Great Ennead amongst various mythical early
rulers, each of which reined for hundreds of years. This suggests a corrupted memory of the long-lived generations listed in Genesis 5. Prominent ancestors becoming ‘deified’ well after their deaths is a known phenomenon.
Egyptian beliefs about Atum provide more clues of his connection to
early Genesis. Images of Atum appear in 20th Dynasty tombs (c. 1189–1077
BC) showing him battling with a serpent
called Apophis
in front of a tree called the Ished tree. Atum
is depicted as a cat—considered the natural enemy of snakes. Such images
appear c. 1280 BC in papyri collections
of religious spells, called the ‘Book of the Dead’, which were buried
with the deceased. Atum is shown with one paw crushing the head of
Apophis, while the other paw takes a knife to decapitate it. Egyptian
priests connected with this belief made models of Apophis which were
trampled, stabbed, and burned, in order to vanquish the snake’s evil.
As part of His pronouncement of the Curse when Adam and Eve sinned, God
said that the serpent’s head would be bruised by the coming Seed (Genesis 3:15), whom Paul calls the ‘last Adam’ (1 Corinthians 15:45). However, the Egyptian version has Atum already victorious over the serpent—crushing its head.
The Ished tree is clearly connected with both knowledge and length of
life in Egyptian inscriptions. For instance, a wall inscription on 
the
Pharaoh Ramesses II temple at Thebes (c. 1300 BC)
depicts Atum and a god called Thoth, writing on the leaves of the Ished
tree the reign length assigned to the enthroned king.
Interestingly, the name Ished (originally pronounced ‘ish-d-et’ in
the Pyramid Texts) sounds like Hebrew ‘tree of knowledge’—pronounced
ets-ha-da-at. (Hebrew ‘tree’ = ets, ‘the knowledge of’ = ha-da-at).
Therefore, the sound and meaning of a part of this Edenic tree’s name
was likely incorporated into Egyptian religion.
As expected, ‘echoes of Eden and Genesis’ are indeed present in the
records of early Egypt, in more than one form. Starting with the Bible
as God’s revealed truth about history equips us to make genuine
discoveries." CMI