165485761 has 8 divisors (see below), whose sum is σ = 189209664. Its totient is φ = 141782640.

The previous prime is 165485753. The next prime is 165485777. The reversal of 165485761 is 167584561.

165485761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165485761 - 2³ = 165485753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165485711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20091 + ... + 27103.

It is an arithmetic number, because the mean of its divisors is an integer number (23651208).

Almost surely, 2^165485761 is an apocalyptic number.

It is an amenable number.

165485761 is a deficient number, since it is larger than the sum of its proper divisors (23723903).

165485761 is an equidigital number, since it uses as much as digits as its factorization.

165485761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10391.

The product of its digits is 201600, while the sum is 43.

The square root of 165485761 is about 12864.1269039138. The cubic root of 165485761 is about 549.0183713659.

The spelling of 165485761 in words is "one hundred sixty-five million, four hundred eighty-five thousand, seven hundred sixty-one".