6624024640 has 28 divisors (see below), whose sum is σ = 15773459436. Its totient is φ = 2649609728.

The previous prime is 6624024623. The next prime is 6624024643. The reversal of 6624024640 is 464204266.

It can be written as a sum of positive squares in 2 ways, for example, as 2159646784 + 4464377856 = 46472^2 + 66816^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6624024596 and 6624024605.

It is not an unprimeable number, because it can be changed into a prime (6624024643) 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, 10349719 + ... + 10350358.

It is an arithmetic number, because the mean of its divisors is an integer number (563337837).

Almost surely, 2^6624024640 is an apocalyptic number.

It is an amenable number.

6624024640 is an abundant number, since it is smaller than the sum of its proper divisors (9149434796).

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

6624024640 is a wasteful number, since it uses less digits than its factorization.

6624024640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20700094 (or 20700084 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

The square root of 6624024640 is about 81388.1111711041. Note that the first 4 decimals coincide. The cubic root of 6624024640 is about 1878.0507032568.

The spelling of 6624024640 in words is "six billion, six hundred twenty-four million, twenty-four thousand, six hundred forty".