Q: Is 666,801 a Prime Number?
A: No, 666,801 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 666801 can be evenly divided by 1 3 9 43 129 387 1,723 5,169 15,507 74,089 222,267 and 666,801, with no remainder.
Since 666,801 cannot be divided by just 1 and 666,801, it is not a prime number.