165266655 has 16 divisors (see below), whose sum is σ = 278344320. Its totient is φ = 83503008.

The previous prime is 165266593. The next prime is 165266659. The reversal of 165266655 is 556662561.

It is not a de Polignac number, because 165266655 - 2⁸ = 165266399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165266659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289657 + ... + 290226.

It is an arithmetic number, because the mean of its divisors is an integer number (17396520).

Almost surely, 2^165266655 is an apocalyptic number.

165266655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165266655 is a deficient number, since it is larger than the sum of its proper divisors (113077665).

165266655 is a wasteful number, since it uses less digits than its factorization.

165266655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579910.

The product of its digits is 324000, while the sum is 42.

The square root of 165266655 is about 12855.6079202813. The cubic root of 165266655 is about 548.7759610869.

The spelling of 165266655 in words is "one hundred sixty-five million, two hundred sixty-six thousand, six hundred fifty-five".