666071788359 has 4 divisors (see below), whose sum is σ = 888095717816. Its totient is φ = 444047858904.

The previous prime is 666071788357. The next prime is 666071788363. The reversal of 666071788359 is 953887170666.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 666071788359 - 2¹ = 666071788357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 666071788359.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666071788357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111011964724 + ... + 111011964729.

It is an arithmetic number, because the mean of its divisors is an integer number (222023929454).

Almost surely, 2^666071788359 is an apocalyptic number.

666071788359 is a deficient number, since it is larger than the sum of its proper divisors (222023929457).

666071788359 is a wasteful number, since it uses less digits than its factorization.

666071788359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222023929456.

The product of its (nonzero) digits is 91445760, while the sum is 66.

The spelling of 666071788359 in words is "six hundred sixty-six billion, seventy-one million, seven hundred eighty-eight thousand, three hundred fifty-nine".