165665511160 has 64 divisors (see below), whose sum is σ = 374476608000. Its totient is φ = 65959065600.

The previous prime is 165665511149. The next prime is 165665511181. The reversal of 165665511160 is 61115566561.

It is a super-3 number, since 3×165665511160³ (a number of 35 digits) contains 333 as substring.

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, 34518441 + ... + 34523239.

It is an arithmetic number, because the mean of its divisors is an integer number (5851197000).

Almost surely, 2^165665511160 is an apocalyptic number.

165665511160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165665511160 is an abundant number, since it is smaller than the sum of its proper divisors (208811096840).

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

165665511160 is a wasteful number, since it uses less digits than its factorization.

165665511160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8632 (or 8628 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 43.

The spelling of 165665511160 in words is "one hundred sixty-five billion, six hundred sixty-five million, five hundred eleven thousand, one hundred sixty".