Q: Is 665,667 a Prime Number?
A: No, 665,667 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 665667 can be evenly divided by 1 3 9 37 111 333 1,999 5,997 17,991 73,963 221,889 and 665,667, with no remainder.
Since 665,667 cannot be divided by just 1 and 665,667, it is not a prime number.