Q: Is 666,764 a Prime Number?
A: No, 666,764 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 666764 can be evenly divided by 1 2 4 7 14 28 23,813 47,626 95,252 166,691 333,382 and 666,764, with no remainder.
Since 666,764 cannot be divided by just 1 and 666,764, it is not a prime number.