Q: Is 166,420 a Prime Number?
A: No, 166,420 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 166420 can be evenly divided by 1 2 4 5 10 20 53 106 157 212 265 314 530 628 785 1,060 1,570 3,140 8,321 16,642 33,284 41,605 83,210 and 166,420, with no remainder.
Since 166,420 cannot be divided by just 1 and 166,420, it is not a prime number.