6620504 has 32 divisors (see below), whose sum is σ = 14135040. Its totient is φ = 2877600.

The previous prime is 6620503. The next prime is 6620507. The reversal of 6620504 is 4050266.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 6620504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6620501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389 + ... + 3659.

It is an arithmetic number, because the mean of its divisors is an integer number (441720).

Almost surely, 2^6620504 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 6620504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7067520).

6620504 is an abundant number, since it is smaller than the sum of its proper divisors (7514536).

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

6620504 is a wasteful number, since it uses less digits than its factorization.

6620504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3311 (or 3307 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 6620504 is about 2573.0340067710. The cubic root of 6620504 is about 187.7717919059.

The spelling of 6620504 in words is "six million, six hundred twenty thousand, five hundred four".