6620244800 has 84 divisors (see below), whose sum is σ = 17543067276. Its totient is φ = 2444390400.

The previous prime is 6620244779. The next prime is 6620244809. The reversal of 6620244800 is 84420266.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 350138944 + 6270105856 = 18712^2 + 79184^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6620244809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138341 + ... + 179940.

It is an arithmetic number, because the mean of its divisors is an integer number (208846039).

Almost surely, 2^6620244800 is an apocalyptic number.

It is an amenable number.

6620244800 is an abundant number, since it is smaller than the sum of its proper divisors (10922822476).

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

6620244800 is a wasteful number, since it uses less digits than its factorization.

6620244800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318316 (or 318301 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 6620244800 is about 81364.8867755619. The cubic root of 6620244800 is about 1877.6934138332.

The spelling of 6620244800 in words is "six billion, six hundred twenty million, two hundred forty-four thousand, eight hundred".