66612574127 has 4 divisors (see below), whose sum is σ = 72668262696. Its totient is φ = 60556885560.

The previous prime is 66612574123. The next prime is 66612574129. The reversal of 66612574127 is 72147521666.

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

It is a cyclic number.

It is not a de Polignac number, because 66612574127 - 2² = 66612574123 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66612574123) 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, 3027844268 + ... + 3027844289.

It is an arithmetic number, because the mean of its divisors is an integer number (18167065674).

Almost surely, 2^66612574127 is an apocalyptic number.

66612574127 is a deficient number, since it is larger than the sum of its proper divisors (6055688569).

66612574127 is a wasteful number, since it uses less digits than its factorization.

66612574127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6055688568.

The product of its digits is 846720, while the sum is 47.

The spelling of 66612574127 in words is "sixty-six billion, six hundred twelve million, five hundred seventy-four thousand, one hundred twenty-seven".