66181175133 has 32 divisors (see below), whose sum is σ = 91032928896. Its totient is φ = 42736232448.

The previous prime is 66181175113. The next prime is 66181175149. The reversal of 66181175133 is 33157118166.

It is not a de Polignac number, because 66181175133 - 2⁶ = 66181175069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66181175113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44625810 + ... + 44627292.

It is an arithmetic number, because the mean of its divisors is an integer number (2844779028).

Almost surely, 2^66181175133 is an apocalyptic number.

It is an amenable number.

66181175133 is a deficient number, since it is larger than the sum of its proper divisors (24851753763).

66181175133 is a wasteful number, since it uses less digits than its factorization.

66181175133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3053.

The product of its digits is 90720, while the sum is 42.

The spelling of 66181175133 in words is "sixty-six billion, one hundred eighty-one million, one hundred seventy-five thousand, one hundred thirty-three".