6664550544 has 60 divisors (see below), whose sum is σ = 18665078796. Its totient is φ = 2219897856.

The previous prime is 6664550537. The next prime is 6664550551. The reversal of 6664550544 is 4450554666.

It is an interprime number because it is at equal distance from previous prime (6664550537) and next prime (6664550551).

It can be written as a sum of positive squares in 2 ways, for example, as 6074643600 + 589906944 = 77940^2 + 24288^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6664550544.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 190204 + ... + 222500.

Almost surely, 2^6664550544 is an apocalyptic number.

It is an amenable number.

6664550544 is an abundant number, since it is smaller than the sum of its proper divisors (12000528252).

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

6664550544 is a wasteful number, since it uses less digits than its factorization.

6664550544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33744 (or 33735 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 45.

The square root of 6664550544 is about 81636.6985123725. The cubic root of 6664550544 is about 1881.8729019216.

The spelling of 6664550544 in words is "six billion, six hundred sixty-four million, five hundred fifty thousand, five hundred forty-four".