6564876684 has 12 divisors (see below), whose sum is σ = 15318045624. Its totient is φ = 2188292224.

The previous prime is 6564876673. The next prime is 6564876719. The reversal of 6564876684 is 4866784656.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×6564876684² = 86195211752253671712, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273536517 + ... + 273536540.

It is an arithmetic number, because the mean of its divisors is an integer number (1276503802).

Almost surely, 2^6564876684 is an apocalyptic number.

It is an amenable number.

6564876684 is an abundant number, since it is smaller than the sum of its proper divisors (8753168940).

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

6564876684 is a wasteful number, since it uses less digits than its factorization.

6564876684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547073064 (or 547073062 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 60.

The square root of 6564876684 is about 81023.9266143033. The cubic root of 6564876684 is about 1872.4440845500. Note that the first 3 decimals are identical.

The spelling of 6564876684 in words is "six billion, five hundred sixty-four million, eight hundred seventy-six thousand, six hundred eighty-four".