66181175124 has 12 divisors (see below), whose sum is σ = 154422741984. Its totient is φ = 22060391704.

The previous prime is 66181175113. The next prime is 66181175149. The reversal of 66181175124 is 42157118166.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2757548952 + ... + 2757548975.

It is an arithmetic number, because the mean of its divisors is an integer number (12868561832).

Almost surely, 2^66181175124 is an apocalyptic number.

It is an amenable number.

66181175124 is an abundant number, since it is smaller than the sum of its proper divisors (88241566860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66181175124 is a wasteful number, since it uses less digits than its factorization.

66181175124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5515097934 (or 5515097932 counting only the distinct ones).

The product of its digits is 80640, while the sum is 42.

The spelling of 66181175124 in words is "sixty-six billion, one hundred eighty-one million, one hundred seventy-five thousand, one hundred twenty-four".