Q: Is 561,665 a Prime Number?
A: No, 561,665 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 561665 can be evenly divided by 1 5 13 65 8,641 43,205 112,333 and 561,665, with no remainder.
Since 561,665 cannot be divided by just 1 and 561,665, it is not a prime number.