666666730189 has 4 divisors (see below), whose sum is σ = 667049653660. Its totient is φ = 666283806720.

The previous prime is 666666730181. The next prime is 666666730229. The reversal of 666666730189 is 981037666666.

666666730189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 176939692164 + 489727038025 = 420642^2 + 699805^2 .

It is a cyclic number.

It is not a de Polignac number, because 666666730189 - 2³ = 666666730181 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 666666730189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666666730181) 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, 191459124 + ... + 191462605.

It is an arithmetic number, because the mean of its divisors is an integer number (166762413415).

Almost surely, 2^666666730189 is an apocalyptic number.

It is an amenable number.

666666730189 is a deficient number, since it is larger than the sum of its proper divisors (382923471).

666666730189 is a wasteful number, since it uses less digits than its factorization.

666666730189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382923470.

The product of its (nonzero) digits is 70543872, while the sum is 64.

The spelling of 666666730189 in words is "six hundred sixty-six billion, six hundred sixty-six million, seven hundred thirty thousand, one hundred eighty-nine".