6668405012 has 24 divisors (see below), whose sum is σ = 11835997992. Its totient is φ = 3286976000.

The previous prime is 6668404999. The next prime is 6668405033. The reversal of 6668405012 is 2105048666.

It can be written as a sum of positive squares in 4 ways, for example, as 1635070096 + 5033334916 = 40436^2 + 70946^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58712 + ... + 129552.

It is an arithmetic number, because the mean of its divisors is an integer number (493166583).

Almost surely, 2^6668405012 is an apocalyptic number.

It is an amenable number.

6668405012 is a deficient number, since it is larger than the sum of its proper divisors (5167592980).

6668405012 is a wasteful number, since it uses less digits than its factorization.

6668405012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71179 (or 71177 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 6668405012 is about 81660.3025465862. The cubic root of 6668405012 is about 1882.2356281047.

The spelling of 6668405012 in words is "six billion, six hundred sixty-eight million, four hundred five thousand, twelve".