66231306189 has 12 divisors (see below), whose sum is σ = 96078035196. Its totient is φ = 43964699712.

The previous prime is 66231306143. The next prime is 66231306217. The reversal of 66231306189 is 98160313266.

66231306189 is a `hidden beast` number, since 6 + 6 + 23 + 1 + 3 + 0 + 618 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 26683222500 + 39548083689 = 163350^2 + 198867^2 .

It is not a de Polignac number, because 66231306189 - 2¹⁷ = 66231175117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66231306289) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15789822 + ... + 15794015.

It is an arithmetic number, because the mean of its divisors is an integer number (8006502933).

Almost surely, 2^66231306189 is an apocalyptic number.

It is an amenable number.

66231306189 is a deficient number, since it is larger than the sum of its proper divisors (29846729007).

66231306189 is a wasteful number, since it uses less digits than its factorization.

66231306189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31584076 (or 31584073 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 66231306189 in words is "sixty-six billion, two hundred thirty-one million, three hundred six thousand, one hundred eighty-nine".