66066558127 has 4 divisors (see below), whose sum is σ = 68939017200. Its totient is φ = 63194099056.

The previous prime is 66066558121. The next prime is 66066558163. The reversal of 66066558127 is 72185566066.

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 66066558127 - 2¹⁵ = 66066525359 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 (66066558121) 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, 1436229502 + ... + 1436229547.

It is an arithmetic number, because the mean of its divisors is an integer number (17234754300).

Almost surely, 2^66066558127 is an apocalyptic number.

66066558127 is a deficient number, since it is larger than the sum of its proper divisors (2872459073).

66066558127 is a wasteful number, since it uses less digits than its factorization.

66066558127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2872459072.

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 66066558127 in words is "sixty-six billion, sixty-six million, five hundred fifty-eight thousand, one hundred twenty-seven".