556665501161 has 32 divisors (see below), whose sum is σ = 726606720000. Its totient is φ = 413761884480.

The previous prime is 556665501137. The next prime is 556665501169. The reversal of 556665501161 is 161105566655.

It is not a de Polignac number, because 556665501161 - 2⁶ = 556665501097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (556665501169) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1316411 + ... + 1687088.

It is an arithmetic number, because the mean of its divisors is an integer number (22706460000).

Almost surely, 2^556665501161 is an apocalyptic number.

It is an amenable number.

556665501161 is a deficient number, since it is larger than the sum of its proper divisors (169941218839).

556665501161 is a wasteful number, since it uses less digits than its factorization.

556665501161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3003629.

The product of its (nonzero) digits is 810000, while the sum is 47.

The spelling of 556665501161 in words is "five hundred fifty-six billion, six hundred sixty-five million, five hundred one thousand, one hundred sixty-one".