6685688 has 16 divisors (see below), whose sum is σ = 12617880. Its totient is φ = 3320928.

The previous prime is 6685687. The next prime is 6685697. The reversal of 6685688 is 8865866.

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 (6685687) 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 3 ways as a sum of consecutive naturals, for example, 1406 + ... + 3917.

Almost surely, 2^6685688 is an apocalyptic number.

It is an amenable number.

6685688 is a deficient number, since it is larger than the sum of its proper divisors (5932192).

6685688 is a wasteful number, since it uses less digits than its factorization.

6685688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5486 (or 5482 counting only the distinct ones).

The product of its digits is 552960, while the sum is 47.

The square root of 6685688 is about 2585.6697391585. The cubic root of 6685688 is about 188.3860334067.

The spelling of 6685688 in words is "six million, six hundred eighty-five thousand, six hundred eighty-eight".