Q: Is 666,789 a Prime Number?
A: No, 666,789 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 666789 can be evenly divided by 1 3 47 141 4,729 14,187 222,263 and 666,789, with no remainder.
Since 666,789 cannot be divided by just 1 and 666,789, it is not a prime number.