6688880 has 60 divisors (see below), whose sum is σ = 17118696. Its totient is φ = 2428800.

The previous prime is 6688859. The next prime is 6688907. The reversal of 6688880 is 888866.

It is a super-2 number, since 2×6688880² = 89482231308800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9335 + ... + 10025.

Almost surely, 2^6688880 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6688880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8559348).

6688880 is an abundant number, since it is smaller than the sum of its proper divisors (10429816).

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

6688880 is a wasteful number, since it uses less digits than its factorization.

6688880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726 (or 709 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 44.

The square root of 6688880 is about 2586.2869137047. The cubic root of 6688880 is about 188.4160095062.

It can be divided in two parts, 6 and 688880, that added together give a palindrome (688886).

The spelling of 6688880 in words is "six million, six hundred eighty-eight thousand, eight hundred eighty".