6566411663556 has 48 divisors (see below), whose sum is σ = 15423864632064. Its totient is φ = 2174242079776.

The previous prime is 6566411663521. The next prime is 6566411663563. The reversal of 6566411663556 is 6553661146656.

It is a self number, because there is not a number n which added to its sum of digits gives 6566411663556.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1514010 + ... + 3927473.

It is an arithmetic number, because the mean of its divisors is an integer number (321330513168).

Almost surely, 2^{6566411663556} is an apocalyptic number.

It is an amenable number.

6566411663556 is an abundant number, since it is smaller than the sum of its proper divisors (8857452968508).

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

6566411663556 is a wasteful number, since it uses less digits than its factorization.

6566411663556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5442160 (or 5442158 counting only the distinct ones).

The product of its digits is 69984000, while the sum is 60.

The spelling of 6566411663556 in words is "six trillion, five hundred sixty-six billion, four hundred eleven million, six hundred sixty-three thousand, five hundred fifty-six".