5661165516165 has 32 divisors (see below), whose sum is σ = 10656311564160. Its totient is φ = 2841683081472.

The previous prime is 5661165516121. The next prime is 5661165516187. The reversal of 5661165516165 is 5616155611665.

5661165516165 is a `hidden beast` number, since 5 + 6 + 6 + 1 + 1 + 65 + 516 + 1 + 65 = 666.

It is not a de Polignac number, because 5661165516165 - 2⁹ = 5661165515653 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1233367099 + ... + 1233371688.

It is an arithmetic number, because the mean of its divisors is an integer number (333009736380).

Almost surely, 2^{5661165516165} is an apocalyptic number.

It is an amenable number.

5661165516165 is a deficient number, since it is larger than the sum of its proper divisors (4995146047995).

5661165516165 is a wasteful number, since it uses less digits than its factorization.

5661165516165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466738818 (or 2466738812 counting only the distinct ones).

The product of its digits is 4860000, while the sum is 54.

The spelling of 5661165516165 in words is "five trillion, six hundred sixty-one billion, one hundred sixty-five million, five hundred sixteen thousand, one hundred sixty-five".