6686109 has 24 divisors (see below), whose sum is σ = 10007712. Its totient is φ = 4299360.

The previous prime is 6686107. The next prime is 6686167. The reversal of 6686109 is 9016866.

It is not a de Polignac number, because 6686109 - 2¹ = 6686107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6686107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50974 + ... + 51104.

It is an arithmetic number, because the mean of its divisors is an integer number (416988).

Almost surely, 2^6686109 is an apocalyptic number.

It is an amenable number.

6686109 is a deficient number, since it is larger than the sum of its proper divisors (3321603).

6686109 is a wasteful number, since it uses less digits than its factorization.

6686109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 6686109 is about 2585.7511481192. The cubic root of 6686109 is about 188.3899875675.

The spelling of 6686109 in words is "six million, six hundred eighty-six thousand, one hundred nine".