Q: Is 661,507 a Prime Number?
A: No, 661,507 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 661507 can be evenly divided by 1 7 11 71 77 121 497 781 847 1,331 5,467 8,591 9,317 60,137 94,501 and 661,507, with no remainder.
Since 661,507 cannot be divided by just 1 and 661,507, it is not a prime number.