6686634 has 16 divisors (see below), whose sum is σ = 13433472. Its totient is φ = 2218848.

The previous prime is 6686611. The next prime is 6686653. The reversal of 6686634 is 4366866.

It is a super-2 number, since 2×6686634² = 89422148499912, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6686592 and 6686601.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 994 + ... + 3789.

It is an arithmetic number, because the mean of its divisors is an integer number (839592).

Almost surely, 2^6686634 is an apocalyptic number.

6686634 is an abundant number, since it is smaller than the sum of its proper divisors (6746838).

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

6686634 is a wasteful number, since it uses less digits than its factorization.

6686634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5021.

The product of its digits is 124416, while the sum is 39.

The square root of 6686634 is about 2585.8526640163. The cubic root of 6686634 is about 188.3949182955.

The spelling of 6686634 in words is "six million, six hundred eighty-six thousand, six hundred thirty-four".