6644473133 has 16 divisors (see below), whose sum is σ = 7029868032. Its totient is φ = 6270264000.

The previous prime is 6644473091. The next prime is 6644473169. The reversal of 6644473133 is 3313744466.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6644473133 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6644473183) 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, 877343 + ... + 884883.

It is an arithmetic number, because the mean of its divisors is an integer number (439366752).

Almost surely, 2^6644473133 is an apocalyptic number.

It is an amenable number.

6644473133 is a deficient number, since it is larger than the sum of its proper divisors (385394899).

6644473133 is a wasteful number, since it uses less digits than its factorization.

6644473133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8276.

The product of its digits is 435456, while the sum is 41.

The square root of 6644473133 is about 81513.6377117351. The cubic root of 6644473133 is about 1879.9812444372.

The spelling of 6644473133 in words is "six billion, six hundred forty-four million, four hundred seventy-three thousand, one hundred thirty-three".