6668505994 has 8 divisors (see below), whose sum is σ = 10003277088. Its totient is φ = 3334080300.

The previous prime is 6668505979. The next prime is 6668506027. The reversal of 6668505994 is 4995058666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30982 + ... + 119569.

It is an arithmetic number, because the mean of its divisors is an integer number (1250409636).

Almost surely, 2^6668505994 is an apocalyptic number.

6668505994 is a deficient number, since it is larger than the sum of its proper divisors (3334771094).

6668505994 is a wasteful number, since it uses less digits than its factorization.

6668505994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172700.

The product of its (nonzero) digits is 13996800, while the sum is 58.

The square root of 6668505994 is about 81660.9208495716. The cubic root of 6668505994 is about 1882.2451291752.

The spelling of 6668505994 in words is "six billion, six hundred sixty-eight million, five hundred five thousand, nine hundred ninety-four".