165620735 has 48 divisors (see below), whose sum is σ = 240768000. Its totient is φ = 108972864.

The previous prime is 165620687. The next prime is 165620737. The reversal of 165620735 is 537026561.

It is not a de Polignac number, because 165620735 - 2¹⁸ = 165358591 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a junction number, because it is equal to n+sod(n) for n = 165620695 and 165620704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165620737) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 832166 + ... + 832364.

It is an arithmetic number, because the mean of its divisors is an integer number (5016000).

Almost surely, 2^165620735 is an apocalyptic number.

165620735 is a deficient number, since it is larger than the sum of its proper divisors (75147265).

165620735 is a wasteful number, since it uses less digits than its factorization.

165620735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340 (or 333 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 165620735 is about 12869.3719737989. The cubic root of 165620735 is about 549.1675948148.

The spelling of 165620735 in words is "one hundred sixty-five million, six hundred twenty thousand, seven hundred thirty-five".