666345111433 has 4 divisors (see below), whose sum is σ = 666350879380. Its totient is φ = 666339343488.

The previous prime is 666345111379. The next prime is 666345111449. The reversal of 666345111433 is 334111543666.

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

It can be written as a sum of positive squares in 2 ways, for example, as 421164656784 + 245180454649 = 648972^2 + 495157^2 .

It is a cyclic number.

It is not a de Polignac number, because 666345111433 - 2²⁵ = 666311557001 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 666345111433.

It is not an unprimeable number, because it can be changed into a prime (666345141433) 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, 2707068 + ... + 2942941.

It is an arithmetic number, because the mean of its divisors is an integer number (166587719845).

Almost surely, 2^666345111433 is an apocalyptic number.

It is an amenable number.

666345111433 is a deficient number, since it is larger than the sum of its proper divisors (5767947).

666345111433 is a wasteful number, since it uses less digits than its factorization.

666345111433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5767946.

The product of its digits is 466560, while the sum is 43.

The spelling of 666345111433 in words is "six hundred sixty-six billion, three hundred forty-five million, one hundred eleven thousand, four hundred thirty-three".