666666673340 has 24 divisors (see below), whose sum is σ = 1400839916112. Its totient is φ = 266506688000.

The previous prime is 666666673297. The next prime is 666666673357. The reversal of 666666673340 is 43376666666.

666666673340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 666666673340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9964661 + ... + 10031340.

It is an arithmetic number, because the mean of its divisors is an integer number (58368329838).

Almost surely, 2^666666673340 is an apocalyptic number.

It is an amenable number.

666666673340 is an abundant number, since it is smaller than the sum of its proper divisors (734173242772).

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

666666673340 is a wasteful number, since it uses less digits than its factorization.

666666673340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19997677 (or 19997675 counting only the distinct ones).

The product of its (nonzero) digits is 70543872, while the sum is 59.

The spelling of 666666673340 in words is "six hundred sixty-six billion, six hundred sixty-six million, six hundred seventy-three thousand, three hundred forty".