Q: Is 666,672 a Prime Number?
A: No, 666,672 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 666672 can be evenly divided by 1 2 3 4 6 8 12 16 17 19 24 34 38 43 48 51 57 68 76 86 102 114 129 136 152 172 204 228 258 272 304 323 344 408 456 516 646 688 731 816 817 912 969 1,032 1,292 1,462 1,634 1,938 2,064 2,193 2,451 2,584 2,924 3,268 3,876 4,386 4,902 5,168 5,848 6,536 7,752 8,772 9,804 11,696 13,072 13,889 15,504 17,544 19,608 27,778 35,088 39,216 41,667 55,556 83,334 111,112 166,668 222,224 333,336 and 666,672, with no remainder.
Since 666,672 cannot be divided by just 1 and 666,672, it is not a prime number.