6643168446 has 16 divisors (see below), whose sum is σ = 13744486800. Its totient is φ = 2138031168.

The previous prime is 6643168409. The next prime is 6643168447. The reversal of 6643168446 is 6448613466.

It is a junction number, because it is equal to n+sod(n) for n = 6643168395 and 6643168404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6643168447) 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, 19089391 + ... + 19089738.

It is an arithmetic number, because the mean of its divisors is an integer number (859030425).

Almost surely, 2^6643168446 is an apocalyptic number.

6643168446 is an abundant number, since it is smaller than the sum of its proper divisors (7101318354).

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

6643168446 is a wasteful number, since it uses less digits than its factorization.

6643168446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38179163.

The product of its digits is 1990656, while the sum is 48.

The square root of 6643168446 is about 81505.6344432702. The cubic root of 6643168446 is about 1879.8581873942.

The spelling of 6643168446 in words is "six billion, six hundred forty-three million, one hundred sixty-eight thousand, four hundred forty-six".