6686872 has 8 divisors (see below), whose sum is σ = 12537900. Its totient is φ = 3343432.

The previous prime is 6686861. The next prime is 6686893. The reversal of 6686872 is 2786866.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417922 + ... + 417937.

Almost surely, 2^6686872 is an apocalyptic number.

It is an amenable number.

6686872 is a deficient number, since it is larger than the sum of its proper divisors (5851028).

6686872 is a wasteful number, since it uses less digits than its factorization.

6686872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835865 (or 835861 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The square root of 6686872 is about 2585.8986832434. The cubic root of 6686872 is about 188.3971534739.

The spelling of 6686872 in words is "six million, six hundred eighty-six thousand, eight hundred seventy-two".