6668935994 has 8 divisors (see below), whose sum is σ = 11432461728. Its totient is φ = 2858115420.

The previous prime is 6668935979. The next prime is 6668936009. The reversal of 6668935994 is 4995398666.

It is an interprime number because it is at equal distance from previous prime (6668935979) and next prime (6668936009).

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

It is a self number, because there is not a number n which added to its sum of digits gives 6668935994.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238176272 + ... + 238176299.

It is an arithmetic number, because the mean of its divisors is an integer number (1429057716).

Almost surely, 2^6668935994 is an apocalyptic number.

6668935994 is a deficient number, since it is larger than the sum of its proper divisors (4763525734).

6668935994 is a wasteful number, since it uses less digits than its factorization.

6668935994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476352580.

The product of its digits is 75582720, while the sum is 65.

The square root of 6668935994 is about 81663.5536454299. The cubic root of 6668935994 is about 1882.2855854139.

The spelling of 6668935994 in words is "six billion, six hundred sixty-eight million, nine hundred thirty-five thousand, nine hundred ninety-four".