6686291 has 4 divisors (see below), whose sum is σ = 6692400. Its totient is φ = 6680184.

The previous prime is 6686279. The next prime is 6686299. The reversal of 6686291 is 1926866.

6686291 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6686291 - 2⁶ = 6686227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6686299) 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, 911 + ... + 3768.

It is an arithmetic number, because the mean of its divisors is an integer number (1673100).

Almost surely, 2^6686291 is an apocalyptic number.

6686291 is a deficient number, since it is larger than the sum of its proper divisors (6109).

6686291 is a wasteful number, since it uses less digits than its factorization.

6686291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6108.

The product of its digits is 31104, while the sum is 38.

The square root of 6686291 is about 2585.7863407482. The cubic root of 6686291 is about 188.3916969158.

The spelling of 6686291 in words is "six million, six hundred eighty-six thousand, two hundred ninety-one".