Q: Is 555,580 a Prime Number?
A: No, 555,580 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 555580 can be evenly divided by 1 2 4 5 10 20 27,779 55,558 111,116 138,895 277,790 and 555,580, with no remainder.
Since 555,580 cannot be divided by just 1 and 555,580, it is not a prime number.