520165659 has 8 divisors (see below), whose sum is σ = 746904592. Its totient is φ = 320101920.

The previous prime is 520165637. The next prime is 520165669. The reversal of 520165659 is 956561025.

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

It is not a de Polignac number, because 520165659 - 2²⁵ = 486611227 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 13337581 = 520165659 / (5 + 2 + 0 + 1 + 6 + 5 + 6 + 5 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520165619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6668752 + ... + 6668829.

It is an arithmetic number, because the mean of its divisors is an integer number (93363074).

Almost surely, 2^520165659 is an apocalyptic number.

520165659 is a deficient number, since it is larger than the sum of its proper divisors (226738933).

520165659 is a wasteful number, since it uses less digits than its factorization.

520165659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13337597.

The product of its (nonzero) digits is 81000, while the sum is 39.

The square root of 520165659 is about 22807.1405265982. The cubic root of 520165659 is about 804.2305361652.

It can be divided in two parts, 52016 and 5659, that added together give a palindrome (57675).

The spelling of 520165659 in words is "five hundred twenty million, one hundred sixty-five thousand, six hundred fifty-nine".