5661666015165 has 32 divisors (see below), whose sum is σ = 10235780380800. Its totient is φ = 2968376302080.

The previous prime is 5661666015163. The next prime is 5661666015199. The reversal of 5661666015165 is 5615106661665.

It is not a de Polignac number, because 5661666015165 - 2¹ = 5661666015163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661666015163) 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, 355401076 + ... + 355417005.

It is an arithmetic number, because the mean of its divisors is an integer number (319868136900).

Almost surely, 2^{5661666015165} is an apocalyptic number.

It is an amenable number.

5661666015165 is a deficient number, since it is larger than the sum of its proper divisors (4574114365635).

5661666015165 is a wasteful number, since it uses less digits than its factorization.

5661666015165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710818154 (or 710818148 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 54.

The spelling of 5661666015165 in words is "five trillion, six hundred sixty-one billion, six hundred sixty-six million, fifteen thousand, one hundred sixty-five".