6600720 has 80 divisors (see below), whose sum is σ = 23391360. Its totient is φ = 1508352.

The previous prime is 6600707. The next prime is 6600721. The reversal of 6600720 is 270066.

6600720 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (6600721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285 + ... + 3644.

It is an arithmetic number, because the mean of its divisors is an integer number (292392).

Almost surely, 2^6600720 is an apocalyptic number.

6600720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6600720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11695680).

6600720 is an abundant number, since it is smaller than the sum of its proper divisors (16790640).

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

6600720 is a wasteful number, since it uses less digits than its factorization.

6600720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3952 (or 3946 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 6600720 is about 2569.1866417215. The cubic root of 6600720 is about 187.5845662976.

Adding to 6600720 its reverse (270066), we get a palindrome (6870786).

The spelling of 6600720 in words is "six million, six hundred thousand, seven hundred twenty".