6643247012 has 12 divisors (see below), whose sum is σ = 12309546060. Its totient is φ = 3126233856.

The previous prime is 6643247003. The next prime is 6643247027. The reversal of 6643247012 is 2107423466.

It can be written as a sum of positive squares in 2 ways, for example, as 2248087396 + 4395159616 = 47414^2 + 66296^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48847337 + ... + 48847472.

It is an arithmetic number, because the mean of its divisors is an integer number (1025795505).

Almost surely, 2^6643247012 is an apocalyptic number.

It is an amenable number.

6643247012 is a deficient number, since it is larger than the sum of its proper divisors (5666299048).

6643247012 is a wasteful number, since it uses less digits than its factorization.

6643247012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97694830 (or 97694828 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 6643247012 is about 81506.1164085248. The cubic root of 6643247012 is about 1879.8655981329.

The spelling of 6643247012 in words is "six billion, six hundred forty-three million, two hundred forty-seven thousand, twelve".