165509330 has 32 divisors (see below), whose sum is σ = 343094400. Its totient is φ = 56309760.

The previous prime is 165509327. The next prime is 165509339. The reversal of 165509330 is 33905561.

165509330 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (165509339) 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, 146 + ... + 18194.

It is an arithmetic number, because the mean of its divisors is an integer number (10721700).

Almost surely, 2^165509330 is an apocalyptic number.

165509330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165509330 is an abundant number, since it is smaller than the sum of its proper divisors (177585070).

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

165509330 is a wasteful number, since it uses less digits than its factorization.

165509330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18194.

The product of its (nonzero) digits is 12150, while the sum is 32.

The square root of 165509330 is about 12865.0429459058. The cubic root of 165509330 is about 549.0444344335.

The spelling of 165509330 in words is "one hundred sixty-five million, five hundred nine thousand, three hundred thirty".