Q: Is 566,661 a Prime Number?
A: No, 566,661 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 566661 can be evenly divided by 1 3 17 41 51 123 271 697 813 2,091 4,607 11,111 13,821 33,333 188,887 and 566,661, with no remainder.
Since 566,661 cannot be divided by just 1 and 566,661, it is not a prime number.