668910307 has 8 divisors (see below), whose sum is σ = 722685600. Its totient is φ = 615466560.

The previous prime is 668910299. The next prime is 668910313. The reversal of 668910307 is 703019866.

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 668910307 - 2³ = 668910299 is a prime.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 668910307.

It is not an unprimeable number, because it can be changed into a prime (668917307) 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, 78682 + ... + 86767.

It is an arithmetic number, because the mean of its divisors is an integer number (90335700).

Almost surely, 2^668910307 is an apocalyptic number.

668910307 is a deficient number, since it is larger than the sum of its proper divisors (53775293).

668910307 is a wasteful number, since it uses less digits than its factorization.

668910307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165773.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 668910307 is about 25863.3003887748. The cubic root of 668910307 is about 874.5593675858.

The spelling of 668910307 in words is "six hundred sixty-eight million, nine hundred ten thousand, three hundred seven".