Q: Is 166,580 a Prime Number?
A: No, 166,580 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 166580 can be evenly divided by 1 2 4 5 10 20 8,329 16,658 33,316 41,645 83,290 and 166,580, with no remainder.
Since 166,580 cannot be divided by just 1 and 166,580, it is not a prime number.