165055506 has 32 divisors (see below), whose sum is σ = 411568128. Its totient is φ = 42871440.

The previous prime is 165055487. The next prime is 165055511. The reversal of 165055506 is 605550561.

165055506 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×165055506³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon 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, 178170 + ... + 179093.

It is an arithmetic number, because the mean of its divisors is an integer number (12861504).

Almost surely, 2^165055506 is an apocalyptic number.

165055506 is an abundant number, since it is smaller than the sum of its proper divisors (246512622).

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

165055506 is a wasteful number, since it uses less digits than its factorization.

165055506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357286.

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 165055506 is about 12847.3929651116. The cubic root of 165055506 is about 548.5421513122.

It can be divided in two parts, 165055 and 506, that added together give a palindrome (165561).

The spelling of 165055506 in words is "one hundred sixty-five million, fifty-five thousand, five hundred six".