165650655 has 16 divisors (see below), whose sum is σ = 267389280. Its totient is φ = 87564288.

The previous prime is 165650633. The next prime is 165650687. The reversal of 165650655 is 556056561.

It is not a de Polignac number, because 165650655 - 2¹⁸ = 165388511 is a prime.

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, 47170 + ... + 50559.

It is an arithmetic number, because the mean of its divisors is an integer number (16711830).

Almost surely, 2^165650655 is an apocalyptic number.

165650655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165650655 is a deficient number, since it is larger than the sum of its proper divisors (101738625).

165650655 is a wasteful number, since it uses less digits than its factorization.

165650655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97850.

The product of its (nonzero) digits is 135000, while the sum is 39.

The square root of 165650655 is about 12870.5343711907. The cubic root of 165650655 is about 549.2006625445.

It can be divided in two parts, 1656506 and 55, that added together give a palindrome (1656561).

The spelling of 165650655 in words is "one hundred sixty-five million, six hundred fifty thousand, six hundred fifty-five".