6620383040 has 28 divisors (see below), whose sum is σ = 15764787876. Its totient is φ = 2648153088.

The previous prime is 6620383039. The next prime is 6620383057. The reversal of 6620383040 is 403830266.

It can be written as a sum of positive squares in 2 ways, for example, as 2649366784 + 3971016256 = 51472^2 + 63016^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 6620382988 and 6620383006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10344029 + ... + 10344668.

Almost surely, 2^6620383040 is an apocalyptic number.

It is an amenable number.

6620383040 is an abundant number, since it is smaller than the sum of its proper divisors (9144404836).

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

6620383040 is a wasteful number, since it uses less digits than its factorization.

6620383040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20688714 (or 20688704 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 6620383040 is about 81365.7362776249. The cubic root of 6620383040 is about 1877.7064833665.

The spelling of 6620383040 in words is "six billion, six hundred twenty million, three hundred eighty-three thousand, forty".