516665565 has 48 divisors (see below), whose sum is σ = 968298240. Its totient is φ = 253342080.

The previous prime is 516665563. The next prime is 516665599. The reversal of 516665565 is 565566615.

It is not a de Polignac number, because 516665565 - 2¹ = 516665563 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 516665565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516665563) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 156906 + ... + 160164.

It is an arithmetic number, because the mean of its divisors is an integer number (20172880).

Almost surely, 2^516665565 is an apocalyptic number.

It is an amenable number.

516665565 is a deficient number, since it is larger than the sum of its proper divisors (451632675).

516665565 is a wasteful number, since it uses less digits than its factorization.

516665565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3554 (or 3551 counting only the distinct ones).

The product of its digits is 810000, while the sum is 45.

The square root of 516665565 is about 22730.2785948611. The cubic root of 516665565 is about 802.4226378972.

The spelling of 516665565 in words is "five hundred sixteen million, six hundred sixty-five thousand, five hundred sixty-five".