6686712 has 80 divisors (see below), whose sum is σ = 19863360. Its totient is φ = 2094336.

The previous prime is 6686711. The next prime is 6686717. The reversal of 6686712 is 2176866.

It is a happy number.

6686712 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6686711) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10713 + ... + 11319.

It is an arithmetic number, because the mean of its divisors is an integer number (248292).

Almost surely, 2^6686712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6686712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9931680).

6686712 is an abundant number, since it is smaller than the sum of its proper divisors (13176648).

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

6686712 is a wasteful number, since it uses less digits than its factorization.

6686712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 629 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 6686712 is about 2585.8677460381. The cubic root of 6686712 is about 188.3956508388.

The spelling of 6686712 in words is "six million, six hundred eighty-six thousand, seven hundred twelve".