6566923864 has 8 divisors (see below), whose sum is σ = 12312982260. Its totient is φ = 3283461928.

The previous prime is 6566923859. The next prime is 6566923871. The reversal of 6566923864 is 4683296656.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

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 as a sum of consecutive naturals, namely, 410432734 + ... + 410432749.

Almost surely, 2^6566923864 is an apocalyptic number.

It is an amenable number.

6566923864 is a deficient number, since it is larger than the sum of its proper divisors (5746058396).

6566923864 is a wasteful number, since it uses less digits than its factorization.

6566923864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820865489 (or 820865485 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 55.

The square root of 6566923864 is about 81036.5588114402. The cubic root of 6566923864 is about 1872.6386975836.

The spelling of 6566923864 in words is "six billion, five hundred sixty-six million, nine hundred twenty-three thousand, eight hundred sixty-four".