6668904403 has 4 divisors (see below), whose sum is σ = 7621605040. Its totient is φ = 5716203768.

The previous prime is 6668904391. The next prime is 6668904421. The reversal of 6668904403 is 3044098666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6668904403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6668904433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476350308 + ... + 476350321.

It is an arithmetic number, because the mean of its divisors is an integer number (1905401260).

Almost surely, 2^6668904403 is an apocalyptic number.

6668904403 is a deficient number, since it is larger than the sum of its proper divisors (952700637).

6668904403 is an equidigital number, since it uses as much as digits as its factorization.

6668904403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952700636.

The product of its (nonzero) digits is 746496, while the sum is 46.

The square root of 6668904403 is about 81663.3602235421. The cubic root of 6668904403 is about 1882.2826132567.

The spelling of 6668904403 in words is "six billion, six hundred sixty-eight million, nine hundred four thousand, four hundred three".