Q: Is 671,665 a Prime Number?
A: No, 671,665 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 671665 can be evenly divided by 1 5 134,333 and 671,665, with no remainder.
Since 671,665 cannot be divided by just 1 and 671,665, it is not a prime number.