6685423 has 4 divisors (see below), whose sum is σ = 6690600. Its totient is φ = 6680248.

The previous prime is 6685409. The next prime is 6685447. The reversal of 6685423 is 3245866.

It is a happy number.

6685423 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 6685423 - 2⁵ = 6685391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6685823) 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, 1128 + ... + 3826.

It is an arithmetic number, because the mean of its divisors is an integer number (1672650).

Almost surely, 2^6685423 is an apocalyptic number.

6685423 is a deficient number, since it is larger than the sum of its proper divisors (5177).

6685423 is a wasteful number, since it uses less digits than its factorization.

6685423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5176.

The product of its digits is 34560, while the sum is 34.

The square root of 6685423 is about 2585.6184946740. The cubic root of 6685423 is about 188.3835443606.

The spelling of 6685423 in words is "six million, six hundred eighty-five thousand, four hundred twenty-three".