6685407 has 12 divisors (see below), whose sum is σ = 9734400. Its totient is φ = 4421088.

The previous prime is 6685391. The next prime is 6685409. The reversal of 6685407 is 7045866.

It is a happy number.

6685407 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6685407 - 2⁴ = 6685391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6685409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1782 + ... + 4067.

It is an arithmetic number, because the mean of its divisors is an integer number (811200).

Almost surely, 2^6685407 is an apocalyptic number.

6685407 is a deficient number, since it is larger than the sum of its proper divisors (3048993).

6685407 is a wasteful number, since it uses less digits than its factorization.

6685407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5982 (or 5979 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 6685407 is about 2585.6154006348. The cubic root of 6685407 is about 188.3833940764.

The spelling of 6685407 in words is "six million, six hundred eighty-five thousand, four hundred seven".