668430345879 has 16 divisors (see below), whose sum is σ = 991165017600. Its totient is φ = 445216203288.

The previous prime is 668430345839. The next prime is 668430345883. The reversal of 668430345879 is 978543034866.

668430345879 is a `hidden beast` number, since 6 + 6 + 8 + 43 + 0 + 3 + 4 + 587 + 9 = 666.

It is not a de Polignac number, because 668430345879 - 2²¹ = 668428248727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668430345839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11192649 + ... + 11252210.

It is an arithmetic number, because the mean of its divisors is an integer number (61947813600).

Almost surely, 2^668430345879 is an apocalyptic number.

668430345879 is a deficient number, since it is larger than the sum of its proper divisors (322734671721).

668430345879 is a wasteful number, since it uses less digits than its factorization.

668430345879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22445971 (or 22445965 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 63.

The spelling of 668430345879 in words is "six hundred sixty-eight billion, four hundred thirty million, three hundred forty-five thousand, eight hundred seventy-nine".