165265660 has 48 divisors (see below), whose sum is σ = 404139456. Its totient is φ = 55590912.

The previous prime is 165265637. The next prime is 165265669. The reversal of 165265660 is 66562561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165265669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3717 + ... + 18556.

It is an arithmetic number, because the mean of its divisors is an integer number (8419572).

Almost surely, 2^165265660 is an apocalyptic number.

165265660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165265660 is an abundant number, since it is smaller than the sum of its proper divisors (238873796).

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

165265660 is a wasteful number, since it uses less digits than its factorization.

165265660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22342 (or 22340 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 165265660 is about 12855.5692211586. The cubic root of 165265660 is about 548.7748597694.

The spelling of 165265660 in words is "one hundred sixty-five million, two hundred sixty-five thousand, six hundred sixty".