5665989888 has 108 divisors (see below), whose sum is σ = 17593188340. Its totient is φ = 1743372288.

The previous prime is 5665989787. The next prime is 5665989913. The reversal of 5665989888 is 8889895665.

5665989888 is a `hidden beast` number, since 566 + 59 + 8 + 9 + 8 + 8 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2463335424 + 3202654464 = 49632^2 + 56592^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64633 + ... + 124536.

Almost surely, 2^5665989888 is an apocalyptic number.

It is an amenable number.

5665989888 is an abundant number, since it is smaller than the sum of its proper divisors (11927198452).

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

5665989888 is a wasteful number, since it uses less digits than its factorization.

5665989888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189204 (or 189187 counting only the distinct ones).

The product of its digits is 298598400, while the sum is 72.

The square root of 5665989888 is about 75272.7698972211. The cubic root of 5665989888 is about 1782.7561023324.

The spelling of 5665989888 in words is "five billion, six hundred sixty-five million, nine hundred eighty-nine thousand, eight hundred eighty-eight".