165766065 has 24 divisors (see below), whose sum is σ = 281752320. Its totient is φ = 83205888.

The previous prime is 165765983. The next prime is 165766067. The reversal of 165766065 is 560667561.

165766065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165766065 - 2¹¹ = 165764017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165766067) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14785 + ... + 23454.

It is an arithmetic number, because the mean of its divisors is an integer number (11739680).

Almost surely, 2^165766065 is an apocalyptic number.

165766065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165766065 is a deficient number, since it is larger than the sum of its proper divisors (115986255).

165766065 is a wasteful number, since it uses less digits than its factorization.

165766065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38281 (or 38264 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 42.

The square root of 165766065 is about 12875.0170873673. The cubic root of 165766065 is about 549.3281769498.

The spelling of 165766065 in words is "one hundred sixty-five million, seven hundred sixty-six thousand, sixty-five".