6981680 has 40 divisors (see below), whose sum is σ = 16351632. Its totient is φ = 2772224.

The previous prime is 6981671. The next prime is 6981697. The reversal of 6981680 is 861896.

6981680 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15539 + ... + 15981.

Almost surely, 2^6981680 is an apocalyptic number.

It is an amenable number.

6981680 is an abundant number, since it is smaller than the sum of its proper divisors (9369952).

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

6981680 is a wasteful number, since it uses less digits than its factorization.

6981680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653 (or 647 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 6981680 is about 2642.2868882845. The cubic root of 6981680 is about 191.1260920091.

It can be divided in two parts, 69816 and 80, that added together give a palindrome (69896).

The spelling of 6981680 in words is "six million, nine hundred eighty-one thousand, six hundred eighty".