Q: Is 685,660 a Prime Number?
A: No, 685,660 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 685660 can be evenly divided by 1 2 4 5 10 20 34,283 68,566 137,132 171,415 342,830 and 685,660, with no remainder.
Since 685,660 cannot be divided by just 1 and 685,660, it is not a prime number.