6690306556 has 24 divisors (see below), whose sum is σ = 11994970176. Its totient is φ = 3263622720.

The previous prime is 6690306551. The next prime is 6690306607. The reversal of 6690306556 is 6556030966.

It is a super-2 number, since 2×6690306556² = 89520403626513162272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6690306551) 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, 3466 + ... + 115726.

It is an arithmetic number, because the mean of its divisors is an integer number (499790424).

Almost surely, 2^6690306556 is an apocalyptic number.

It is an amenable number.

6690306556 is a deficient number, since it is larger than the sum of its proper divisors (5304663620).

6690306556 is a wasteful number, since it uses less digits than its factorization.

6690306556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112629 (or 112627 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 46.

The square root of 6690306556 is about 81794.2941530765. The cubic root of 6690306556 is about 1884.2940322246.

The spelling of 6690306556 in words is "six billion, six hundred ninety million, three hundred six thousand, five hundred fifty-six".