6684156 has 36 divisors (see below), whose sum is σ = 17107272. Its totient is φ = 2200224.

The previous prime is 6684151. The next prime is 6684163. The reversal of 6684156 is 6514866.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 6684156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6684151) 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 11 ways as a sum of consecutive naturals, for example, 1870 + ... + 4106.

It is an arithmetic number, because the mean of its divisors is an integer number (475202).

Almost surely, 2^6684156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6684156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8553636).

6684156 is an abundant number, since it is smaller than the sum of its proper divisors (10423116).

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

6684156 is a wasteful number, since it uses less digits than its factorization.

6684156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2330 (or 2325 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 6684156 is about 2585.3734739878. The cubic root of 6684156 is about 188.3716429929.

The spelling of 6684156 in words is "six million, six hundred eighty-four thousand, one hundred fifty-six".