Q: Is 666,940 a Prime Number?
A: No, 666,940 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 666940 can be evenly divided by 1 2 4 5 10 20 33,347 66,694 133,388 166,735 333,470 and 666,940, with no remainder.
Since 666,940 cannot be divided by just 1 and 666,940, it is not a prime number.