666384068405 has 8 divisors (see below), whose sum is σ = 872357325984. Its totient is φ = 484642958800.

The previous prime is 666384068269. The next prime is 666384068443. The reversal of 666384068405 is 504860483666.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 666384068405 - 2⁸ = 666384068149 is a prime.

It is a Duffinian number.

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, 6058036931 + ... + 6058037040.

It is an arithmetic number, because the mean of its divisors is an integer number (109044665748).

Almost surely, 2^666384068405 is an apocalyptic number.

It is an amenable number.

666384068405 is a deficient number, since it is larger than the sum of its proper divisors (205973257579).

666384068405 is a wasteful number, since it uses less digits than its factorization.

666384068405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12116073987.

The product of its (nonzero) digits is 19906560, while the sum is 56.

The spelling of 666384068405 in words is "six hundred sixty-six billion, three hundred eighty-four million, sixty-eight thousand, four hundred five".