66725675727 has 4 divisors (see below), whose sum is σ = 88967567640. Its totient is φ = 44483783816.

The previous prime is 66725675719. The next prime is 66725675729. The reversal of 66725675727 is 72757652766.

It is a happy number.

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 66725675727 - 2³ = 66725675719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66725675729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11120945952 + ... + 11120945957.

It is an arithmetic number, because the mean of its divisors is an integer number (22241891910).

Almost surely, 2^66725675727 is an apocalyptic number.

66725675727 is a deficient number, since it is larger than the sum of its proper divisors (22241891913).

66725675727 is a wasteful number, since it uses less digits than its factorization.

66725675727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22241891912.

The product of its digits is 51861600, while the sum is 60.

The spelling of 66725675727 in words is "sixty-six billion, seven hundred twenty-five million, six hundred seventy-five thousand, seven hundred twenty-seven".