6684636 has 24 divisors (see below), whose sum is σ = 17825920. Its totient is φ = 1909872.

The previous prime is 6684631. The next prime is 6684647. The reversal of 6684636 is 6364866.

It is a junction number, because it is equal to n+sod(n) for n = 6684594 and 6684603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6684631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39706 + ... + 39873.

Almost surely, 2^6684636 is an apocalyptic number.

It is an amenable number.

6684636 is an abundant number, since it is smaller than the sum of its proper divisors (11141284).

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

6684636 is a wasteful number, since it uses less digits than its factorization.

6684636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79593 (or 79591 counting only the distinct ones).

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

The square root of 6684636 is about 2585.4663022364. The cubic root of 6684636 is about 188.3761519753.

The spelling of 6684636 in words is "six million, six hundred eighty-four thousand, six hundred thirty-six".