6618320 has 20 divisors (see below), whose sum is σ = 15387780. Its totient is φ = 2647296.

The previous prime is 6618299. The next prime is 6618323. The reversal of 6618320 is 238166.

It can be written as a sum of positive squares in 2 ways, for example, as 2521744 + 4096576 = 1588^2 + 2024^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 6618320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6618323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41285 + ... + 41444.

It is an arithmetic number, because the mean of its divisors is an integer number (769389).

Almost surely, 2^6618320 is an apocalyptic number.

It is an amenable number.

6618320 is an abundant number, since it is smaller than the sum of its proper divisors (8769460).

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

6618320 is a wasteful number, since it uses less digits than its factorization.

6618320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82742 (or 82736 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 6618320 is about 2572.6095700669. The cubic root of 6618320 is about 187.7511419828.

The spelling of 6618320 in words is "six million, six hundred eighteen thousand, three hundred twenty".