668366907 has 8 divisors (see below), whose sum is σ = 959706384. Its totient is φ = 411302688.

The previous prime is 668366869. The next prime is 668366969. The reversal of 668366907 is 709663866.

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

It is not a de Polignac number, because 668366907 - 2⁸ = 668366651 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 668366907.

It is not an unprimeable number, because it can be changed into a prime (668366977) 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, 8568768 + ... + 8568845.

It is an arithmetic number, because the mean of its divisors is an integer number (119963298).

Almost surely, 2^668366907 is an apocalyptic number.

668366907 is a deficient number, since it is larger than the sum of its proper divisors (291339477).

668366907 is a wasteful number, since it uses less digits than its factorization.

668366907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17137629.

The product of its (nonzero) digits is 1959552, while the sum is 51.

The square root of 668366907 is about 25852.7930212579. The cubic root of 668366907 is about 874.3224826592.

The spelling of 668366907 in words is "six hundred sixty-eight million, three hundred sixty-six thousand, nine hundred seven".