Q: Is 166,640 a Prime Number?
A: No, 166,640 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 166640 can be evenly divided by 1 2 4 5 8 10 16 20 40 80 2,083 4,166 8,332 10,415 16,664 20,830 33,328 41,660 83,320 and 166,640, with no remainder.
Since 166,640 cannot be divided by just 1 and 166,640, it is not a prime number.