Q: Is 1,666,668 a Prime Number?
A: No, 1,666,668 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 1666668 can be evenly divided by 1 2 3 4 6 12 138,889 277,778 416,667 555,556 833,334 and 1,666,668, with no remainder.
Since 1,666,668 cannot be divided by just 1 and 1,666,668, it is not a prime number.