6556736 has 28 divisors (see below), whose sum is σ = 13263372. Its totient is φ = 3214848.

The previous prime is 6556727. The next prime is 6556741. The reversal of 6556736 is 6376556.

It can be written as a sum of positive squares in 2 ways, for example, as 4596736 + 1960000 = 2144^2 + 1400^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6556736.

It is a congruent number.

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, 2426 + ... + 4358.

Almost surely, 2^6556736 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 6556736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6631686).

6556736 is an abundant number, since it is smaller than the sum of its proper divisors (6706636).

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

6556736 is a wasteful number, since it uses less digits than its factorization.

6556736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998 (or 1988 counting only the distinct ones).

The product of its digits is 113400, while the sum is 38.

The square root of 6556736 is about 2560.6124267448. The cubic root of 6556736 is about 187.1669798335.

The spelling of 6556736 in words is "six million, five hundred fifty-six thousand, seven hundred thirty-six".