Q: Is 6,667,221 a Prime Number?
A: No, 6,667,221 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 6667221 can be evenly divided by 1 3 11 33 121 363 18,367 55,101 202,037 606,111 2,222,407 and 6,667,221, with no remainder.
Since 6,667,221 cannot be divided by just 1 and 6,667,221, it is not a prime number.