165013605 has 40 divisors (see below), whose sum is σ = 297357984. Its totient is φ = 87544800.

The previous prime is 165013603. The next prime is 165013627. The reversal of 165013605 is 506310561.

It is a happy number.

165013605 is a `hidden beast` number, since 1 + 6 + 50 + 1 + 3 + 605 = 666.

It is not a de Polignac number, because 165013605 - 2¹ = 165013603 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165013603) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 84490 + ... + 86420.

Almost surely, 2^165013605 is an apocalyptic number.

165013605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165013605 is a deficient number, since it is larger than the sum of its proper divisors (132344379).

165013605 is a wasteful number, since it uses less digits than its factorization.

165013605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2159 (or 2150 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 165013605 is about 12845.7621416559. The cubic root of 165013605 is about 548.4957297367.

The spelling of 165013605 in words is "one hundred sixty-five million, thirteen thousand, six hundred five".