6635880855 has 20 divisors (see below), whose sum is σ = 11895431592. Its totient is φ = 3539136240.

The previous prime is 6635880803. The next prime is 6635880859. The reversal of 6635880855 is 5580885366.

6635880855 is a `hidden beast` number, since 6 + 6 + 3 + 588 + 0 + 8 + 55 = 666.

It is not a de Polignac number, because 6635880855 - 2⁸ = 6635880599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6635880859) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8192041 + ... + 8192850.

Almost surely, 2^6635880855 is an apocalyptic number.

6635880855 is a deficient number, since it is larger than the sum of its proper divisors (5259550737).

6635880855 is a wasteful number, since it uses less digits than its factorization.

6635880855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16384908 (or 16384899 counting only the distinct ones).

The product of its (nonzero) digits is 6912000, while the sum is 54.

The square root of 6635880855 is about 81460.9161193268. The cubic root of 6635880855 is about 1879.1705310798.

The spelling of 6635880855 in words is "six billion, six hundred thirty-five million, eight hundred eighty thousand, eight hundred fifty-five".