Q: Is 671,816 a Prime Number?
A: No, 671,816 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 671816 can be evenly divided by 1 2 4 8 79 158 316 632 1,063 2,126 4,252 8,504 83,977 167,954 335,908 and 671,816, with no remainder.
Since 671,816 cannot be divided by just 1 and 671,816, it is not a prime number.