165711816 has 48 divisors (see below), whose sum is σ = 450824400. Its totient is φ = 54988512.

The previous prime is 165711797. The next prime is 165711823. The reversal of 165711816 is 618117561.

165711816 is a `hidden beast` number, since 1 + 6 + 571 + 1 + 81 + 6 = 666.

165711816 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11275 + ... + 21413.

It is an arithmetic number, because the mean of its divisors is an integer number (9392175).

Almost surely, 2^165711816 is an apocalyptic number.

It is an amenable number.

165711816 is an abundant number, since it is smaller than the sum of its proper divisors (285112584).

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

165711816 is a wasteful number, since it uses less digits than its factorization.

165711816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10378 (or 10371 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 165711816 is about 12872.9101604882. The cubic root of 165711816 is about 549.2682455927.

The spelling of 165711816 in words is "one hundred sixty-five million, seven hundred eleven thousand, eight hundred sixteen".