6694566668 has 24 divisors (see below), whose sum is σ = 12229859040. Its totient is φ = 3200440320.

The previous prime is 6694566631. The next prime is 6694566707. The reversal of 6694566668 is 8666654966.

It is a self number, because there is not a number n which added to its sum of digits gives 6694566668.

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 7 ways as a sum of consecutive naturals, for example, 233858 + ... + 260918.

It is an arithmetic number, because the mean of its divisors is an integer number (509577460).

Almost surely, 2^6694566668 is an apocalyptic number.

It is an amenable number.

6694566668 is a deficient number, since it is larger than the sum of its proper divisors (5535292372).

6694566668 is a wasteful number, since it uses less digits than its factorization.

6694566668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29777 (or 29775 counting only the distinct ones).

The product of its digits is 67184640, while the sum is 62.

The square root of 6694566668 is about 81820.3316297361. The cubic root of 6694566668 is about 1884.6938943402.

The spelling of 6694566668 in words is "six billion, six hundred ninety-four million, five hundred sixty-six thousand, six hundred sixty-eight".