165480817 has 4 divisors (see below), whose sum is σ = 165972196. Its totient is φ = 164989440.

The previous prime is 165480803. The next prime is 165480829. The reversal of 165480817 is 718084561.

165480817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 718084561 = 4297 ⋅167113.

It can be written as a sum of positive squares in 2 ways, for example, as 12117361 + 153363456 = 3481^2 + 12384^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165480817 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 165480817.

It is not an unprimeable number, because it can be changed into a prime (165480877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245184 + ... + 245857.

It is an arithmetic number, because the mean of its divisors is an integer number (41493049).

Almost surely, 2^165480817 is an apocalyptic number.

It is an amenable number.

165480817 is a deficient number, since it is larger than the sum of its proper divisors (491379).

165480817 is an equidigital number, since it uses as much as digits as its factorization.

165480817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491378.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 165480817 is about 12863.9347401952. The cubic root of 165480817 is about 549.0129038786.

The spelling of 165480817 in words is "one hundred sixty-five million, four hundred eighty thousand, eight hundred seventeen".