668829179 has 2 divisors, whose sum is σ = 668829180. Its totient is φ = 668829178.

The previous prime is 668829173. The next prime is 668829191. The reversal of 668829179 is 971928866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 668829179 - 2⁴ = 668829163 is a prime.

It is not a weakly prime, because it can be changed into another prime (668829173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334414589 + 334414590.

It is an arithmetic number, because the mean of its divisors is an integer number (334414590).

Almost surely, 2^668829179 is an apocalyptic number.

668829179 is a deficient number, since it is larger than the sum of its proper divisors (1).

668829179 is an equidigital number, since it uses as much as digits as its factorization.

668829179 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 56.

The square root of 668829179 is about 25861.7319412293. The cubic root of 668829179 is about 874.5240095215.

The spelling of 668829179 in words is "six hundred sixty-eight million, eight hundred twenty-nine thousand, one hundred seventy-nine".