6678940 has 24 divisors (see below), whose sum is σ = 14161392. Its totient is φ = 2645760.

The previous prime is 6678929. The next prime is 6678967. The reversal of 6678940 is 498766.

It is a junction number, because it is equal to n+sod(n) for n = 6678893 and 6678902.

It is a congruent number.

It is an unprimeable number.

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, 580 + ... + 3700.

It is an arithmetic number, because the mean of its divisors is an integer number (590058).

Almost surely, 2^6678940 is an apocalyptic number.

It is an amenable number.

6678940 is an abundant number, since it is smaller than the sum of its proper divisors (7482452).

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

6678940 is a wasteful number, since it uses less digits than its factorization.

6678940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3237 (or 3235 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 6678940 is about 2584.3645253718. The cubic root of 6678940 is about 188.3226314609.

The spelling of 6678940 in words is "six million, six hundred seventy-eight thousand, nine hundred forty".