165818055 has 16 divisors (see below), whose sum is σ = 285717600. Its totient is φ = 81633408.

The previous prime is 165818033. The next prime is 165818129. The reversal of 165818055 is 550818561.

It is not a de Polignac number, because 165818055 - 2⁶ = 165817991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent 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, 424980 + ... + 425369.

It is an arithmetic number, because the mean of its divisors is an integer number (17857350).

Almost surely, 2^165818055 is an apocalyptic number.

165818055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165818055 is a deficient number, since it is larger than the sum of its proper divisors (119899545).

165818055 is a wasteful number, since it uses less digits than its factorization.

165818055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850370.

The product of its (nonzero) digits is 48000, while the sum is 39.

The square root of 165818055 is about 12877.0359555295. The cubic root of 165818055 is about 549.3856004172.

The spelling of 165818055 in words is "one hundred sixty-five million, eight hundred eighteen thousand, fifty-five".