6640583004 has 72 divisors (see below), whose sum is σ = 18329945088. Its totient is φ = 2010316320.

The previous prime is 6640582997. The next prime is 6640583039. The reversal of 6640583004 is 4003850466.

6640583004 is a `hidden beast` number, since 6 + 640 + 5 + 8 + 3 + 0 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 6640583004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 422739 + ... + 438165.

Almost surely, 2^6640583004 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 6640583004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9164972544).

6640583004 is an abundant number, since it is smaller than the sum of its proper divisors (11689362084).

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

6640583004 is a wasteful number, since it uses less digits than its factorization.

6640583004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16535 (or 16530 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 6640583004 is about 81489.7723889323. The cubic root of 6640583004 is about 1879.6142829477.

The spelling of 6640583004 in words is "six billion, six hundred forty million, five hundred eighty-three thousand, four".