668984179 has 4 divisors (see below), whose sum is σ = 681606576. Its totient is φ = 656361784.

The previous prime is 668984177. The next prime is 668984207. The reversal of 668984179 is 971489866.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 668984179 - 2¹ = 668984177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668984177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6311119 + ... + 6311224.

It is an arithmetic number, because the mean of its divisors is an integer number (170401644).

Almost surely, 2^668984179 is an apocalyptic number.

668984179 is a deficient number, since it is larger than the sum of its proper divisors (12622397).

668984179 is a wasteful number, since it uses less digits than its factorization.

668984179 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12622396.

The product of its digits is 5225472, while the sum is 58.

The square root of 668984179 is about 25864.7284733476. The cubic root of 668984179 is about 874.5915607766.

The spelling of 668984179 in words is "six hundred sixty-eight million, nine hundred eighty-four thousand, one hundred seventy-nine".