6666743944 has 16 divisors (see below), whose sum is σ = 14285880000. Its totient is φ = 2857175952.

The previous prime is 6666743939. The next prime is 6666743971. The reversal of 6666743944 is 4493476666.

It is a happy number.

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, 59524444 + ... + 59524555.

It is an arithmetic number, because the mean of its divisors is an integer number (892867500).

Almost surely, 2^6666743944 is an apocalyptic number.

It is an amenable number.

6666743944 is an abundant number, since it is smaller than the sum of its proper divisors (7619136056).

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

6666743944 is a wasteful number, since it uses less digits than its factorization.

6666743944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119049012 (or 119049008 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 55.

The square root of 6666743944 is about 81650.1313164896. The cubic root of 6666743944 is about 1882.0793298094.

The spelling of 6666743944 in words is "six billion, six hundred sixty-six million, seven hundred forty-three thousand, nine hundred forty-four".