6688194720 has 48 divisors (see below), whose sum is σ = 21067814880. Its totient is φ = 1783518464.

The previous prime is 6688194707. The next prime is 6688194739. The reversal of 6688194720 is 274918866.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×6688194720² = 89463897225271756800, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 6966390 + ... + 6967349.

It is an arithmetic number, because the mean of its divisors is an integer number (438912810).

Almost surely, 2^6688194720 is an apocalyptic number.

6688194720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6688194720 is an abundant number, since it is smaller than the sum of its proper divisors (14379620160).

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

6688194720 is a wasteful number, since it uses less digits than its factorization.

6688194720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13933757 (or 13933749 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 51.

The square root of 6688194720 is about 81781.3837006932. The cubic root of 6688194720 is about 1884.0957483985.

The spelling of 6688194720 in words is "six billion, six hundred eighty-eight million, one hundred ninety-four thousand, seven hundred twenty".