'Sixty six' in the Bible

All the souls that came with Jacob into Egypt, who came out of his loins, besides Jacob's sons' wives, all the souls were sixty-six.

But if she bears a female, then she shall be unclean two weeks, as in her menstruation. And she shall continue in the blood of her purifying sixty-six days.

And the weight of gold which came to Solomon in one year was six hundred sixty-six talents of gold,

And the weight of gold that came to Solomon in one year was six hundred and sixty-six talents of gold,

The sons of Adonikam, six hundred and sixty-six.

Here is the wisdom. Let him having reason count the number of the beast, for it is the number of a man. And its number is six hundred and sixty-six.