6664264644020 has 24 divisors (see below), whose sum is σ = 14259011523624. Its totient is φ = 2615409520256.

The previous prime is 6664264644019. The next prime is 6664264644029. The reversal of 6664264644020 is 204464624666.

It can be written as a sum of positive squares in 4 ways, for example, as 159204192016 + 6505060452004 = 399004^2 + 2550502^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6664264644020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664264644029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3143519999 + ... + 3143522118.

It is an arithmetic number, because the mean of its divisors is an integer number (594125480151).

Almost surely, 2^{6664264644020} is an apocalyptic number.

It is an amenable number.

6664264644020 is an abundant number, since it is smaller than the sum of its proper divisors (7594746879604).

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

6664264644020 is a wasteful number, since it uses less digits than its factorization.

6664264644020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6287042179 (or 6287042177 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 50.

The spelling of 6664264644020 in words is "six trillion, six hundred sixty-four billion, two hundred sixty-four million, six hundred forty-four thousand, twenty".