Q: Is 666,004 a Prime Number?
A: No, 666,004 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 666004 can be evenly divided by 1 2 4 31 41 62 82 124 131 164 262 524 1,271 2,542 4,061 5,084 5,371 8,122 10,742 16,244 21,484 166,501 333,002 and 666,004, with no remainder.
Since 666,004 cannot be divided by just 1 and 666,004, it is not a prime number.