556565666565655 has 16 divisors (see below), whose sum is σ = 733596851128320. Its totient is φ = 403478268117408.

The previous prime is 556565666565631. The next prime is 556565666565661.

556565666565655 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 556565666565655 - 2¹¹ = 556565666563607 is a prime.

It is a congruent number.

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, 127360562247 + ... + 127360566616.

It is an arithmetic number, because the mean of its divisors is an integer number (45849803195520).

Almost surely, 2^{556565666565655} is an apocalyptic number.

556565666565655 is a deficient number, since it is larger than the sum of its proper divisors (177031184562665).

556565666565655 is a wasteful number, since it uses less digits than its factorization.

556565666565655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254721128910.

The product of its digits is 109350000000, while the sum is 82.

The spelling of 556565666565655 in words is "five hundred fifty-six trillion, five hundred sixty-five billion, six hundred sixty-six million, five hundred sixty-five thousand, six hundred fifty-five".