6644132665 has 8 divisors (see below), whose sum is σ = 7986545280. Its totient is φ = 5306248752.

The previous prime is 6644132657. The next prime is 6644132669. The reversal of 6644132665 is 5662314466.

6644132665 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6644132665 - 2³ = 6644132657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6644132669) 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, 1128945 + ... + 1134814.

It is an arithmetic number, because the mean of its divisors is an integer number (998318160).

Almost surely, 2^6644132665 is an apocalyptic number.

It is an amenable number.

6644132665 is a deficient number, since it is larger than the sum of its proper divisors (1342412615).

6644132665 is a wasteful number, since it uses less digits than its factorization.

6644132665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2264351.

The product of its digits is 622080, while the sum is 43.

The square root of 6644132665 is about 81511.5492737072. The cubic root of 6644132665 is about 1879.9491333189.

The spelling of 6644132665 in words is "six billion, six hundred forty-four million, one hundred thirty-two thousand, six hundred sixty-five".