6683440 has 40 divisors (see below), whose sum is σ = 16360560. Its totient is φ = 2532096.

The previous prime is 6683429. The next prime is 6683449. The reversal of 6683440 is 443866.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (6683449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 679 + ... + 3718.

It is an arithmetic number, because the mean of its divisors is an integer number (409014).

Almost surely, 2^6683440 is an apocalyptic number.

It is an amenable number.

6683440 is an abundant number, since it is smaller than the sum of its proper divisors (9677120).

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

6683440 is a wasteful number, since it uses less digits than its factorization.

6683440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4429 (or 4423 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 6683440 is about 2585.2349989895. The cubic root of 6683440 is about 188.3649166931.

The spelling of 6683440 in words is "six million, six hundred eighty-three thousand, four hundred forty".