Q: Is 668,125 a Prime Number?
A: No, 668,125 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 668125 can be evenly divided by 1 5 25 125 625 1,069 5,345 26,725 133,625 and 668,125, with no remainder.
Since 668,125 cannot be divided by just 1 and 668,125, it is not a prime number.