6664256 has 28 divisors (see below), whose sum is σ = 13655040. Its totient is φ = 3223680.

The previous prime is 6664237. The next prime is 6664261. The reversal of 6664256 is 6524666.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305 + ... + 3663.

It is an arithmetic number, because the mean of its divisors is an integer number (487680).

Almost surely, 2^6664256 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 6664256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6827520).

6664256 is an abundant number, since it is smaller than the sum of its proper divisors (6990784).

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

6664256 is a wasteful number, since it uses less digits than its factorization.

6664256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3402 (or 3392 counting only the distinct ones).

The product of its digits is 51840, while the sum is 35.

The square root of 6664256 is about 2581.5220316705. The cubic root of 6664256 is about 188.1845177995.

The spelling of 6664256 in words is "six million, six hundred sixty-four thousand, two hundred fifty-six".