Q: Is 678,655 a Prime Number?
A: No, 678,655 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 678655 can be evenly divided by 1 5 135,731 and 678,655, with no remainder.
Since 678,655 cannot be divided by just 1 and 678,655, it is not a prime number.