6664263653 has 16 divisors (see below), whose sum is σ = 7143628464. Its totient is φ = 6194872320.

The previous prime is 6664263649. The next prime is 6664263673. The reversal of 6664263653 is 3563624666.

It can be written as a sum of positive squares in 8 ways, for example, as 231100804 + 6433162849 = 15202^2 + 80207^2 .

It is a cyclic number.

It is not a de Polignac number, because 6664263653 - 2² = 6664263649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6664263598 and 6664263607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664263643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 855251 + ... + 863007.

It is an arithmetic number, because the mean of its divisors is an integer number (446476779).

Almost surely, 2^6664263653 is an apocalyptic number.

It is an amenable number.

6664263653 is a deficient number, since it is larger than the sum of its proper divisors (479364811).

6664263653 is a wasteful number, since it uses less digits than its factorization.

6664263653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8392.

The product of its digits is 2799360, while the sum is 47.

The square root of 6664263653 is about 81634.9413731645. The cubic root of 6664263653 is about 1881.8458983428.

The spelling of 6664263653 in words is "six billion, six hundred sixty-four million, two hundred sixty-three thousand, six hundred fifty-three".