668803926823 has 8 divisors (see below), whose sum is σ = 704404626048. Its totient is φ = 633746749944.

The previous prime is 668803926779. The next prime is 668803926829. The reversal of 668803926823 is 328629308866.

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 668803926823 - 2³³ = 660213992231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668803926829) 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, 135878061 + ... + 135882982.

It is an arithmetic number, because the mean of its divisors is an integer number (88050578256).

Almost surely, 2^668803926823 is an apocalyptic number.

668803926823 is a deficient number, since it is larger than the sum of its proper divisors (35600699225).

668803926823 is a wasteful number, since it uses less digits than its factorization.

668803926823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271761173.

The product of its (nonzero) digits is 35831808, while the sum is 61.

The spelling of 668803926823 in words is "six hundred sixty-eight billion, eight hundred three million, nine hundred twenty-six thousand, eight hundred twenty-three".