668879031 has 8 divisors (see below), whose sum is σ = 930614400. Its totient is φ = 426531512.

The previous prime is 668878993. The next prime is 668879039. The reversal of 668879031 is 130978866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 668879031 - 2⁶ = 668878967 is a prime.

It is a super-2 number, since 2×668879031² = 894798316222997922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668879039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4846881 + ... + 4847018.

It is an arithmetic number, because the mean of its divisors is an integer number (116326800).

Almost surely, 2^668879031 is an apocalyptic number.

668879031 is a deficient number, since it is larger than the sum of its proper divisors (261735369).

668879031 is a wasteful number, since it uses less digits than its factorization.

668879031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9693925.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 668879031 is about 25862.6957411636. The cubic root of 668879031 is about 874.5457368868.

The spelling of 668879031 in words is "six hundred sixty-eight million, eight hundred seventy-nine thousand, thirty-one".