165105860 has 24 divisors (see below), whose sum is σ = 347276160. Its totient is φ = 65936864.

The previous prime is 165105823. The next prime is 165105883. The reversal of 165105860 is 68501561.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6917 + ... + 19443.

It is an arithmetic number, because the mean of its divisors is an integer number (14469840).

Almost surely, 2^165105860 is an apocalyptic number.

165105860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165105860 is an abundant number, since it is smaller than the sum of its proper divisors (182170300).

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

165105860 is a wasteful number, since it uses less digits than its factorization.

165105860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13195 (or 13193 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 165105860 is about 12849.3525128701. The cubic root of 165105860 is about 548.5979274645.

The spelling of 165105860 in words is "one hundred sixty-five million, one hundred five thousand, eight hundred sixty".