6644318805 has 24 divisors (see below), whose sum is σ = 11679033600. Its totient is φ = 3493724640.

The previous prime is 6644318803. The next prime is 6644318809. The reversal of 6644318805 is 5088134466.

It is not a de Polignac number, because 6644318805 - 2¹ = 6644318803 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6644318803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1036605 + ... + 1042994.

It is an arithmetic number, because the mean of its divisors is an integer number (486626400).

Almost surely, 2^6644318805 is an apocalyptic number.

It is an amenable number.

6644318805 is a deficient number, since it is larger than the sum of its proper divisors (5034714795).

6644318805 is a wasteful number, since it uses less digits than its factorization.

6644318805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079681 (or 2079678 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The square root of 6644318805 is about 81512.6910670970. The cubic root of 6644318805 is about 1879.9666891827.

The spelling of 6644318805 in words is "six billion, six hundred forty-four million, three hundred eighteen thousand, eight hundred five".