6686943 has 4 divisors (see below), whose sum is σ = 8915928. Its totient is φ = 4457960.

The previous prime is 6686941. The next prime is 6686947. The reversal of 6686943 is 3496866.

6686943 is digitally balanced in base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6686943 - 2¹ = 6686941 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 6686895 and 6686904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6686941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1114488 + ... + 1114493.

It is an arithmetic number, because the mean of its divisors is an integer number (2228982).

Almost surely, 2^6686943 is an apocalyptic number.

6686943 is a deficient number, since it is larger than the sum of its proper divisors (2228985).

6686943 is a wasteful number, since it uses less digits than its factorization.

6686943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2228984.

The product of its digits is 186624, while the sum is 42.

The square root of 6686943 is about 2585.9124115097. The cubic root of 6686943 is about 188.3978202605.

The spelling of 6686943 in words is "six million, six hundred eighty-six thousand, nine hundred forty-three".