Q: Is 680,656 a Prime Number?
A: No, 680,656 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 680656 can be evenly divided by 1 2 4 8 16 19 38 76 152 304 2,239 4,478 8,956 17,912 35,824 42,541 85,082 170,164 340,328 and 680,656, with no remainder.
Since 680,656 cannot be divided by just 1 and 680,656, it is not a prime number.