6690840576 has 448 divisors, whose sum is σ = 22647859200. Its totient is φ = 1712848896.

The previous prime is 6690840547. The next prime is 6690840581. The reversal of 6690840576 is 6750480966.

It is a tau number, because it is divible by the number of its divisors (448).

It is a super-2 number, since 2×6690840576² = 89534695226896023552, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75177940 + ... + 75178028.

Almost surely, 2^6690840576 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6690840576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11323929600).

6690840576 is an abundant number, since it is smaller than the sum of its proper divisors (15957018624).

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

6690840576 is a wasteful number, since it uses less digits than its factorization.

6690840576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 51.

The square root of 6690840576 is about 81797.5584965713. The cubic root of 6690840576 is about 1884.3441656487.

The spelling of 6690840576 in words is "six billion, six hundred ninety million, eight hundred forty thousand, five hundred seventy-six".