165665341 has 4 divisors (see below), whose sum is σ = 165726652. Its totient is φ = 165604032.

The previous prime is 165665329. The next prime is 165665407. The reversal of 165665341 is 143566561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 96609241 + 69056100 = 9829^2 + 8310^2 .

It is a cyclic number.

It is not a de Polignac number, because 165665341 - 2¹⁵ = 165632573 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165665341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165665441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26406 + ... + 32071.

It is an arithmetic number, because the mean of its divisors is an integer number (41431663).

Almost surely, 2^165665341 is an apocalyptic number.

It is an amenable number.

165665341 is a deficient number, since it is larger than the sum of its proper divisors (61311).

165665341 is an equidigital number, since it uses as much as digits as its factorization.

165665341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61310.

The product of its digits is 64800, while the sum is 37.

The square root of 165665341 is about 12871.1048865278. The cubic root of 165665341 is about 549.2168921263.

The spelling of 165665341 in words is "one hundred sixty-five million, six hundred sixty-five thousand, three hundred forty-one".