6688118899 has 16 divisors (see below), whose sum is σ = 8421002496. Its totient is φ = 5159916000.

The previous prime is 6688118893. The next prime is 6688118911. The reversal of 6688118899 is 9988118866.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6688118899 is a prime.

It is a super-3 number, since 3×6688118899³ (a number of 30 digits) contains 333 as substring.

6688118899 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 6688118899.

It is not an unprimeable number, because it can be changed into a prime (6688118893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 422217 + ... + 437770.

It is an arithmetic number, because the mean of its divisors is an integer number (526312656).

Almost surely, 2^6688118899 is an apocalyptic number.

6688118899 is a deficient number, since it is larger than the sum of its proper divisors (1732883597).

6688118899 is a wasteful number, since it uses less digits than its factorization.

6688118899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860106.

The product of its digits is 11943936, while the sum is 64.

The square root of 6688118899 is about 81780.9201403359. The cubic root of 6688118899 is about 1884.0886286615.

The spelling of 6688118899 in words is "six billion, six hundred eighty-eight million, one hundred eighteen thousand, eight hundred ninety-nine".