Q: Is 518,661 a Prime Number?
A: No, 518,661 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 518661 can be evenly divided by 1 3 9 11 13 31 33 39 93 99 117 143 169 279 341 403 429 507 1,023 1,209 1,287 1,521 1,859 3,069 3,627 4,433 5,239 5,577 13,299 15,717 16,731 39,897 47,151 57,629 172,887 and 518,661, with no remainder.
Since 518,661 cannot be divided by just 1 and 518,661, it is not a prime number.