6690012056 has 32 divisors (see below), whose sum is σ = 15438491040. Its totient is φ = 2646597888.

The previous prime is 6690012053. The next prime is 6690012083. The reversal of 6690012056 is 6502100966.

It is a happy number.

It is a super-2 number, since 2×6690012056² = 89512522618850694272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6690012053) by changing a digit.

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, 4594061 + ... + 4595516.

It is an arithmetic number, because the mean of its divisors is an integer number (482452845).

Almost surely, 2^6690012056 is an apocalyptic number.

It is an amenable number.

6690012056 is an abundant number, since it is smaller than the sum of its proper divisors (8748478984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6690012056 is a wasteful number, since it uses less digits than its factorization.

6690012056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9189603 (or 9189599 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 6690012056 is about 81792.4938854416. The cubic root of 6690012056 is about 1884.2663836293.

The spelling of 6690012056 in words is "six billion, six hundred ninety million, twelve thousand, fifty-six".