6656144 has 40 divisors (see below), whose sum is σ = 14329440. Its totient is φ = 2969600.

The previous prime is 6656123. The next prime is 6656171. The reversal of 6656144 is 4416566.

It is a self number, because there is not a number n which added to its sum of digits gives 6656144.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10064 + ... + 10704.

It is an arithmetic number, because the mean of its divisors is an integer number (358236).

Almost surely, 2^6656144 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 6656144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7164720).

6656144 is an abundant number, since it is smaller than the sum of its proper divisors (7673296).

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

6656144 is a wasteful number, since it uses less digits than its factorization.

6656144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719 (or 713 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 6656144 is about 2579.9503871199. The cubic root of 6656144 is about 188.1081315471.

The spelling of 6656144 in words is "six million, six hundred fifty-six thousand, one hundred forty-four".