'Sixty six' in the Bible

All the souls that came in with Jacob to Egypt that had come forth of his loins, besides Jacob's sons wives, - all the souls, were sixty-six;

But if, a female child, she bear, then shall she be unclean two weeks as in her removal, - and, for sixty-six days, shall she continue in the blood of purification.

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

Now, 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;