6684887 has 12 divisors (see below), whose sum is σ = 7434168. Its totient is φ = 6006000.

The previous prime is 6684869. The next prime is 6684907. The reversal of 6684887 is 7884866.

It is a happy number.

It is not a de Polignac number, because 6684887 - 2⁸ = 6684631 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6684817) 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, 11948 + ... + 12494.

It is an arithmetic number, because the mean of its divisors is an integer number (619514).

Almost surely, 2^6684887 is an apocalyptic number.

6684887 is a deficient number, since it is larger than the sum of its proper divisors (749281).

6684887 is a wasteful number, since it uses less digits than its factorization.

6684887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670 (or 659 counting only the distinct ones).

The product of its digits is 516096, while the sum is 47.

The square root of 6684887 is about 2585.5148423477. The cubic root of 6684887 is about 188.3785097114.

It can be divided in two parts, 668 and 4887, that added together give a palindrome (5555).

The spelling of 6684887 in words is "six million, six hundred eighty-four thousand, eight hundred eighty-seven".