6816680 has 32 divisors (see below), whose sum is σ = 16518600. Its totient is φ = 2516736.

The previous prime is 6816679. The next prime is 6816703. The reversal of 6816680 is 866186.

It can be written as a sum of positive squares in 4 ways, for example, as 3865156 + 2951524 = 1966^2 + 1718^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6816680.

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, 6035 + ... + 7074.

Almost surely, 2^6816680 is an apocalyptic number.

It is an amenable number.

6816680 is an abundant number, since it is smaller than the sum of its proper divisors (9701920).

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

6816680 is a wasteful number, since it uses less digits than its factorization.

6816680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13133 (or 13129 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 6816680 is about 2610.8772472102. The cubic root of 6816680 is about 189.6084271685.

The spelling of 6816680 in words is "six million, eight hundred sixteen thousand, six hundred eighty".