5665637671 has 4 divisors (see below), whose sum is σ = 5665811200. Its totient is φ = 5665464144.

The previous prime is 5665637647. The next prime is 5665637699. The reversal of 5665637671 is 1767365665.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5665637671 - 2⁵ = 5665637639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5665637641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21351 + ... + 108568.

It is an arithmetic number, because the mean of its divisors is an integer number (1416452800).

Almost surely, 2^5665637671 is an apocalyptic number.

5665637671 is a deficient number, since it is larger than the sum of its proper divisors (173529).

5665637671 is a wasteful number, since it uses less digits than its factorization.

5665637671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173528.

The product of its digits is 4762800, while the sum is 52.

The square root of 5665637671 is about 75270.4302565091. The cubic root of 5665637671 is about 1782.7191608606.

The spelling of 5665637671 in words is "five billion, six hundred sixty-five million, six hundred thirty-seven thousand, six hundred seventy-one".