5605615665 has 128 divisors (see below), whose sum is σ = 11176704000. Its totient is φ = 2647717632.

The previous prime is 5605615661. The next prime is 5605615669. The reversal of 5605615665 is 5665165065.

5605615665 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (5605615661) and next prime (5605615669).

It is not a de Polignac number, because 5605615665 - 2² = 5605615661 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 5605615665.

It is not an unprimeable number, because it can be changed into a prime (5605615661) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4451806 + ... + 4453064.

It is an arithmetic number, because the mean of its divisors is an integer number (87318000).

Almost surely, 2^5605615665 is an apocalyptic number.

It is an amenable number.

5605615665 is a deficient number, since it is larger than the sum of its proper divisors (5571088335).

5605615665 is a wasteful number, since it uses less digits than its factorization.

5605615665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388 (or 1382 counting only the distinct ones).

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

The square root of 5605615665 is about 74870.6595736942. The cubic root of 5605615665 is about 1776.4013970147.

The spelling of 5605615665 in words is "five billion, six hundred five million, six hundred fifteen thousand, six hundred sixty-five".