Q: Is 678,760 a Prime Number?
A: No, 678,760 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 678760 can be evenly divided by 1 2 4 5 8 10 20 40 71 142 239 284 355 478 568 710 956 1,195 1,420 1,912 2,390 2,840 4,780 9,560 16,969 33,938 67,876 84,845 135,752 169,690 339,380 and 678,760, with no remainder.
Since 678,760 cannot be divided by just 1 and 678,760, it is not a prime number.