6622720 has 80 divisors (see below), whose sum is σ = 17186400. Its totient is φ = 2433024.

The previous prime is 6622711. The next prime is 6622729. The reversal of 6622720 is 272266.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6622711) and next prime (6622729).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6622729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33181 + ... + 33379.

It is an arithmetic number, because the mean of its divisors is an integer number (214830).

Almost surely, 2^6622720 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 6622720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8593200).

6622720 is an abundant number, since it is smaller than the sum of its proper divisors (10563680).

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

6622720 is a wasteful number, since it uses less digits than its factorization.

6622720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 6622720 is about 2573.4645907803. The cubic root of 6622720 is about 187.7927397508.

Adding to 6622720 its reverse (272266), we get a palindrome (6894986).

The spelling of 6622720 in words is "six million, six hundred twenty-two thousand, seven hundred twenty".