6556004 has 72 divisors (see below), whose sum is σ = 15015168. Its totient is φ = 2479680.

The previous prime is 6556003. The next prime is 6556013. The reversal of 6556004 is 4006556.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (6556003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78947 + ... + 79029.

It is an arithmetic number, because the mean of its divisors is an integer number (208544).

Almost surely, 2^6556004 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 6556004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7507584).

6556004 is an abundant number, since it is smaller than the sum of its proper divisors (8459164).

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

6556004 is a wasteful number, since it uses less digits than its factorization.

6556004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 6556004 is about 2560.4694881994. The cubic root of 6556004 is about 187.1600144101.

The spelling of 6556004 in words is "six million, five hundred fifty-six thousand, four".