6566656566656 has 32 divisors (see below), whose sum is σ = 13090142062200. Its totient is φ = 3281287578624.

The previous prime is 6566656566643. The next prime is 6566656566667.

6566656566656 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15736250 + ... + 16148153.

Almost surely, 2^{6566656566656} is an apocalyptic number.

It is an amenable number.

6566656566656 is a deficient number, since it is larger than the sum of its proper divisors (6523485495544).

6566656566656 is a wasteful number, since it uses less digits than its factorization.

6566656566656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31886026 (or 31886014 counting only the distinct ones).

The product of its digits is 6298560000, while the sum is 74.

The spelling of 6566656566656 in words is "six trillion, five hundred sixty-six billion, six hundred fifty-six million, five hundred sixty-six thousand, six hundred fifty-six".