Arcana Coelestia #738
738. He is called 'a son of six hundred years' here because, as shown already, 'son' means intellectual truth. He is not however referred to as a son in verse 11 below because there the subject is his temptation as regards things of the will.
Genesis 11:27
27
Now this is the history of the generations of Terah. Terah became the father of Abram, Nahor, and Haran. Haran became the father of Lot.