Q: Is 661,637 a Prime Number?
A: No, 661,637 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 661637 can be evenly divided by 1 19 97 359 1,843 6,821 34,823 and 661,637, with no remainder.
Since 661,637 cannot be divided by just 1 and 661,637, it is not a prime number.