Q: Is 667,720 a Prime Number?
A: No, 667,720 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 667720 can be evenly divided by 1 2 4 5 8 10 20 40 16,693 33,386 66,772 83,465 133,544 166,930 333,860 and 667,720, with no remainder.
Since 667,720 cannot be divided by just 1 and 667,720, it is not a prime number.