165368785 has 16 divisors (see below), whose sum is σ = 205752960. Its totient is φ = 127500160.

The previous prime is 165368783. The next prime is 165368803. The reversal of 165368785 is 587863561.

It is not a de Polignac number, because 165368785 - 2¹ = 165368783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165368783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12156 + ... + 21874.

It is an arithmetic number, because the mean of its divisors is an integer number (12859560).

Almost surely, 2^165368785 is an apocalyptic number.

It is an amenable number.

165368785 is a deficient number, since it is larger than the sum of its proper divisors (40384175).

165368785 is an equidigital number, since it uses as much as digits as its factorization.

165368785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9848.

The product of its digits is 1209600, while the sum is 49.

The square root of 165368785 is about 12859.5795032342. The cubic root of 165368785 is about 548.8889803523. Note that the first 3 decimals are identical.

The spelling of 165368785 in words is "one hundred sixty-five million, three hundred sixty-eight thousand, seven hundred eighty-five".