6604220 has 72 divisors (see below), whose sum is σ = 16892064. Its totient is φ = 2158464.

The previous prime is 6604217. The next prime is 6604231. The reversal of 6604220 is 224066.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 6604192 and 6604201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22394 + ... + 22686.

It is an arithmetic number, because the mean of its divisors is an integer number (234612).

Almost surely, 2^6604220 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 6604220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8446032).

6604220 is an abundant number, since it is smaller than the sum of its proper divisors (10287844).

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

6604220 is a wasteful number, since it uses less digits than its factorization.

6604220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 330 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 6604220 is about 2569.8677008749. The cubic root of 6604220 is about 187.6177157102.

Adding to 6604220 its reverse (224066), we get a palindrome (6828286).

The spelling of 6604220 in words is "six million, six hundred four thousand, two hundred twenty".