165625660 has 24 divisors (see below), whose sum is σ = 366120720. Its totient is φ = 62763264.

The previous prime is 165625651. The next prime is 165625661. The reversal of 165625660 is 66526561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165625661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217549 + ... + 218308.

It is an arithmetic number, because the mean of its divisors is an integer number (15255030).

Almost surely, 2^165625660 is an apocalyptic number.

165625660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165625660 is an abundant number, since it is smaller than the sum of its proper divisors (200495060).

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

165625660 is a wasteful number, since it uses less digits than its factorization.

165625660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435885 (or 435883 counting only the distinct ones).

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

The square root of 165625660 is about 12869.5633181550. The cubic root of 165625660 is about 549.1730382226.

Subtracting from 165625660 its reverse (66526561), we obtain a palindrome (99099099).

It can be divided in two parts, 16562 and 5660, that added together give a palindrome (22222).

The spelling of 165625660 in words is "one hundred sixty-five million, six hundred twenty-five thousand, six hundred sixty".