6636634680 has 64 divisors (see below), whose sum is σ = 21441440160. Its totient is φ = 1633632768.

The previous prime is 6636634657. The next prime is 6636634723. The reversal of 6636634680 is 864366366.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2125567 + ... + 2128686.

Almost surely, 2^6636634680 is an apocalyptic number.

6636634680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6636634680 is an abundant number, since it is smaller than the sum of its proper divisors (14804805480).

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

6636634680 is a wasteful number, since it uses less digits than its factorization.

6636634680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4254280 (or 4254276 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 48.

The square root of 6636634680 is about 81465.5429000507. The cubic root of 6636634680 is about 1879.2416852652.

The spelling of 6636634680 in words is "six billion, six hundred thirty-six million, six hundred thirty-four thousand, six hundred eighty".