Q: Is 1,366,664 a Prime Number?
A: No, 1,366,664 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 1366664 can be evenly divided by 1 2 4 8 13 17 26 34 52 68 104 136 221 442 773 884 1,546 1,768 3,092 6,184 10,049 13,141 20,098 26,282 40,196 52,564 80,392 105,128 170,833 341,666 683,332 and 1,366,664, with no remainder.
Since 1,366,664 cannot be divided by just 1 and 1,366,664, it is not a prime number.