'Sixty six' in the Bible

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

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

Here is wisdom. Let him that hath understanding count the number of the beast: for it is the number of a man; and his number is six hundred and sixty six.