5515565660 has 48 divisors (see below), whose sum is σ = 12642376320. Its totient is φ = 2004594240.

The previous prime is 5515565641. The next prime is 5515565683. The reversal of 5515565660 is 665655155.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 493211 + ... + 504269.

It is an arithmetic number, because the mean of its divisors is an integer number (263382840).

Almost surely, 2^5515565660 is an apocalyptic number.

It is an amenable number.

5515565660 is an abundant number, since it is smaller than the sum of its proper divisors (7126810660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5515565660 is a wasteful number, since it uses less digits than its factorization.

5515565660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13346 (or 13344 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 44.

The square root of 5515565660 is about 74266.8543833654. The cubic root of 5515565660 is about 1766.8378174443.

It can be divided in two parts, 5515 and 565660, that added together give a palindrome (571175).

The spelling of 5515565660 in words is "five billion, five hundred fifteen million, five hundred sixty-five thousand, six hundred sixty".