6566256593816 has 32 divisors (see below), whose sum is σ = 12515499097200. Its totient is φ = 3229233745920.

The previous prime is 6566256593779. The next prime is 6566256593881. The reversal of 6566256593816 is 6183956526656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27605081 + ... + 27841928.

Almost surely, 2^{6566256593816} is an apocalyptic number.

It is an amenable number.

6566256593816 is a deficient number, since it is larger than the sum of its proper divisors (5949242503384).

6566256593816 is a wasteful number, since it uses less digits than its factorization.

6566256593816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55447259 (or 55447255 counting only the distinct ones).

The product of its digits is 419904000, while the sum is 68.

The spelling of 6566256593816 in words is "six trillion, five hundred sixty-six billion, two hundred fifty-six million, five hundred ninety-three thousand, eight hundred sixteen".