5665661855 has 16 divisors (see below), whose sum is σ = 7772957184. Its totient is φ = 3883572000.

The previous prime is 5665661831. The next prime is 5665661857. The reversal of 5665661855 is 5581665665.

It is a de Polignac number, because none of the positive numbers 2^k-5665661855 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5665661797 and 5665661806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5665661857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69230 + ... + 126980.

It is an arithmetic number, because the mean of its divisors is an integer number (485809824).

Almost surely, 2^5665661855 is an apocalyptic number.

5665661855 is a deficient number, since it is larger than the sum of its proper divisors (2107295329).

5665661855 is a wasteful number, since it uses less digits than its factorization.

5665661855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60566.

The product of its digits is 6480000, while the sum is 53.

The square root of 5665661855 is about 75270.5909037520. The cubic root of 5665661855 is about 1782.7216973929.

The spelling of 5665661855 in words is "five billion, six hundred sixty-five million, six hundred sixty-one thousand, eight hundred fifty-five".