6664345072 has 120 divisors (see below), whose sum is σ = 16566939648. Its totient is φ = 2541010560.

The previous prime is 6664345043. The next prime is 6664345081. The reversal of 6664345072 is 2705434666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 631713 + ... + 642175.

Almost surely, 2^6664345072 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 6664345072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8283469824).

6664345072 is an abundant number, since it is smaller than the sum of its proper divisors (9902594576).

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

6664345072 is a wasteful number, since it uses less digits than its factorization.

6664345072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10547 (or 10530 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 43.

The square root of 6664345072 is about 81635.4400490375. The cubic root of 6664345072 is about 1881.8535619746.

The spelling of 6664345072 in words is "six billion, six hundred sixty-four million, three hundred forty-five thousand, seventy-two".