Q: Is 1,668,009 a Prime Number?
A: No, 1,668,009 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 1668009 can be evenly divided by 1 3 7 21 49 147 343 1,029 1,621 4,863 11,347 34,041 79,429 238,287 556,003 and 1,668,009, with no remainder.
Since 1,668,009 cannot be divided by just 1 and 1,668,009, it is not a prime number.