Q: Is 166,720 a Prime Number?
A: No, 166,720 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 166720 can be evenly divided by 1 2 4 5 8 10 16 20 32 40 64 80 160 320 521 1,042 2,084 2,605 4,168 5,210 8,336 10,420 16,672 20,840 33,344 41,680 83,360 and 166,720, with no remainder.
Since 166,720 cannot be divided by just 1 and 166,720, it is not a prime number.