6684880 has 20 divisors (see below), whose sum is σ = 15542532. Its totient is φ = 2673920.

The previous prime is 6684869. The next prime is 6684907. The reversal of 6684880 is 884866.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1774224 + 4910656 = 1332^2 + 2216^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×6684880² = 89375241228800, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41701 + ... + 41860.

Almost surely, 2^6684880 is an apocalyptic number.

It is an amenable number.

6684880 is an abundant number, since it is smaller than the sum of its proper divisors (8857652).

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

6684880 is a wasteful number, since it uses less digits than its factorization.

6684880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83574 (or 83568 counting only the distinct ones).

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

The square root of 6684880 is about 2585.5134886517. The cubic root of 6684880 is about 188.3784439586.

The spelling of 6684880 in words is "six million, six hundred eighty-four thousand, eight hundred eighty".