6688880888866 has 96 divisors (see below), whose sum is σ = 11759532390144. Its totient is φ = 2841421440000.

The previous prime is 6688880888863. The next prime is 6688880888873.

It is a happy number.

6688880888866 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×6688880888866² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6688880888861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 338650491 + ... + 338670241.

It is an arithmetic number, because the mean of its divisors is an integer number (122495129064).

Almost surely, 2^{6688880888866} is an apocalyptic number.

6688880888866 is a deficient number, since it is larger than the sum of its proper divisors (5070651501278).

6688880888866 is a wasteful number, since it uses less digits than its factorization.

6688880888866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20368 (or 20357 counting only the distinct ones).

The product of its (nonzero) digits is 21743271936, while the sum is 88.

The spelling of 6688880888866 in words is "six trillion, six hundred eighty-eight billion, eight hundred eighty million, eight hundred eighty-eight thousand, eight hundred sixty-six".