6642443133 has 24 divisors (see below), whose sum is σ = 10162152000. Its totient is φ = 4166527104.

The previous prime is 6642443123. The next prime is 6642443141. The reversal of 6642443133 is 3313442466.

6642443133 is a `hidden beast` number, since 6 + 642 + 4 + 4 + 3 + 1 + 3 + 3 = 666.

It is not a de Polignac number, because 6642443133 - 2¹⁶ = 6642377597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642443113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 858918 + ... + 866616.

It is an arithmetic number, because the mean of its divisors is an integer number (423423000).

Almost surely, 2^6642443133 is an apocalyptic number.

It is an amenable number.

6642443133 is a deficient number, since it is larger than the sum of its proper divisors (3519708867).

6642443133 is a wasteful number, since it uses less digits than its factorization.

6642443133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13361 (or 13358 counting only the distinct ones).

The product of its digits is 124416, while the sum is 36.

The square root of 6642443133 is about 81501.1848564179. The cubic root of 6642443133 is about 1879.7897694789.

Adding to 6642443133 its reverse (3313442466), we get a palindrome (9955885599).

The spelling of 6642443133 in words is "six billion, six hundred forty-two million, four hundred forty-three thousand, one hundred thirty-three".