6688480 has 48 divisors (see below), whose sum is σ = 16737840. Its totient is φ = 2516992.

The previous prime is 6688471. The next prime is 6688481. The reversal of 6688480 is 848866.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6688481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1491 + ... + 3949.

It is an arithmetic number, because the mean of its divisors is an integer number (348705).

Almost surely, 2^6688480 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 6688480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8368920).

6688480 is an abundant number, since it is smaller than the sum of its proper divisors (10049360).

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

6688480 is a wasteful number, since it uses less digits than its factorization.

6688480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2491 (or 2483 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 6688480 is about 2586.2095816078. The cubic root of 6688480 is about 188.4122536255.

The spelling of 6688480 in words is "six million, six hundred eighty-eight thousand, four hundred eighty".