6668880 has 80 divisors (see below), whose sum is σ = 21260544. Its totient is φ = 1728000.

The previous prime is 6668861. The next prime is 6668881. The reversal of 6668880 is 888666.

It is a tau number, because it is divible by the number of its divisors (80).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8505 + ... + 9255.

Almost surely, 2^6668880 is an apocalyptic number.

6668880 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 6668880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10630272).

6668880 is an abundant number, since it is smaller than the sum of its proper divisors (14591664).

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

6668880 is a wasteful number, since it uses less digits than its factorization.

6668880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804 (or 798 counting only the distinct ones).

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

The square root of 6668880 is about 2582.4174720599. The cubic root of 6668880 is about 188.2280317357.

The spelling of 6668880 in words is "six million, six hundred sixty-eight thousand, eight hundred eighty".