6688680 has 64 divisors (see below), whose sum is σ = 20260800. Its totient is φ = 1766400.

The previous prime is 6688673. The next prime is 6688691. The reversal of 6688680 is 868866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16480 + ... + 16880.

It is an arithmetic number, because the mean of its divisors is an integer number (316575).

Almost surely, 2^6688680 is an apocalyptic number.

6688680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6688680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10130400).

6688680 is an abundant number, since it is smaller than the sum of its proper divisors (13572120).

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

6688680 is a wasteful number, since it uses less digits than its factorization.

6688680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 550 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 6688680 is about 2586.2482479453. The cubic root of 6688680 is about 188.4141315845.

It can be divided in two parts, 66886 and 80, that added together give a palindrome (66966).

The spelling of 6688680 in words is "six million, six hundred eighty-eight thousand, six hundred eighty".