6444405066 has 96 divisors (see below), whose sum is σ = 14963457600. Its totient is φ = 1843776000.

The previous prime is 6444405053. The next prime is 6444405073. The reversal of 6444405066 is 6605044446.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5365266 + ... + 5366466.

It is an arithmetic number, because the mean of its divisors is an integer number (155869350).

Almost surely, 2^6444405066 is an apocalyptic number.

6444405066 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 6444405066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7481728800).

6444405066 is an abundant number, since it is smaller than the sum of its proper divisors (8519052534).

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

6444405066 is a wasteful number, since it uses less digits than its factorization.

6444405066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636 (or 1625 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 39.

The square root of 6444405066 is about 80277.0519264379. The cubic root of 6444405066 is about 1860.9196001864.

The spelling of 6444405066 in words is "six billion, four hundred forty-four million, four hundred five thousand, sixty-six".