'Sixty six' in the Bible

All the persons belonging to Jacob who came to Egypt {who were his descendants}, not including the wives of the sons of Jacob [were] sixty-six persons in all.

But if she gives birth to a female, then she shall be unclean [for] two weeks as [in] her menstruation, and [for] sixty-six days she shall stay {through} the blood of [her] cleansing.

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

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

the descendants of Adonikam, six hundred and sixty-six;

Here is wisdom: the one who has understanding, let him calculate the number of the beast, for it is man's number, and his number [is] six hundred sixty-six.