165865106 has 12 divisors (see below), whose sum is σ = 273472206. Its totient is φ = 75393120.

The previous prime is 165865103. The next prime is 165865111. The reversal of 165865106 is 601568561.

165865106 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 165353881 + 511225 = 12859^2 + 715^2 .

It is a super-2 number, since 2×165865106² = 55022466776782472, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 165865106.

It is not an unprimeable number, because it can be changed into a prime (165865103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 342455 + ... + 342938.

Almost surely, 2^165865106 is an apocalyptic number.

165865106 is a deficient number, since it is larger than the sum of its proper divisors (107607100).

165865106 is a wasteful number, since it uses less digits than its factorization.

165865106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685417 (or 685406 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 165865106 is about 12878.8627603527. The cubic root of 165865106 is about 549.4375583647.

The spelling of 165865106 in words is "one hundred sixty-five million, eight hundred sixty-five thousand, one hundred six".