165260645 has 16 divisors (see below), whose sum is σ = 216724032. Its totient is φ = 119976960.

The previous prime is 165260639. The next prime is 165260657. The reversal of 165260645 is 546062561.

It is not a de Polignac number, because 165260645 - 2⁶ = 165260581 is a prime.

It is a super-2 number, since 2×165260645² = 54622161571632050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

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, 33029 + ... + 37701.

It is an arithmetic number, because the mean of its divisors is an integer number (13545252).

Almost surely, 2^165260645 is an apocalyptic number.

It is an amenable number.

165260645 is a deficient number, since it is larger than the sum of its proper divisors (51463387).

165260645 is a wasteful number, since it uses less digits than its factorization.

165260645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5332.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 165260645 is about 12855.3741680279. The cubic root of 165260645 is about 548.7693088406.

The spelling of 165260645 in words is "one hundred sixty-five million, two hundred sixty thousand, six hundred forty-five".