6552806638 has 32 divisors (see below), whose sum is σ = 11955881664. Its totient is φ = 2629435392.

The previous prime is 6552806627. The next prime is 6552806707. The reversal of 6552806638 is 8366082556.

It is a junction number, because it is equal to n+sod(n) for n = 6552806591 and 6552806600.

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, 25395 + ... + 117262.

It is an arithmetic number, because the mean of its divisors is an integer number (373621302).

Almost surely, 2^6552806638 is an apocalyptic number.

6552806638 is a deficient number, since it is larger than the sum of its proper divisors (5403075026).

6552806638 is a wasteful number, since it uses less digits than its factorization.

6552806638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142876.

The product of its (nonzero) digits is 2073600, while the sum is 49.

The square root of 6552806638 is about 80949.4078915961. The cubic root of 6552806638 is about 1871.2958349375.

The spelling of 6552806638 in words is "six billion, five hundred fifty-two million, eight hundred six thousand, six hundred thirty-eight".