6688220866680 has 64 divisors (see below), whose sum is σ = 20364135200640. Its totient is φ = 1756905777792.

The previous prime is 6688220866667. The next prime is 6688220866709. The reversal of 6688220866680 is 866680228866.

It is a super-2 number, since 2×6688220866680² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415926094 + ... + 415942173.

It is an arithmetic number, because the mean of its divisors is an integer number (318189612510).

Almost surely, 2^{6688220866680} is an apocalyptic number.

6688220866680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6688220866680 is an abundant number, since it is smaller than the sum of its proper divisors (13675914333960).

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

6688220866680 is a wasteful number, since it uses less digits than its factorization.

6688220866680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831868348 (or 831868344 counting only the distinct ones).

The product of its (nonzero) digits is 127401984, while the sum is 66.

The spelling of 6688220866680 in words is "six trillion, six hundred eighty-eight billion, two hundred twenty million, eight hundred sixty-six thousand, six hundred eighty".