66127859547 has 24 divisors (see below), whose sum is σ = 93718543296. Its totient is φ = 41466972288.

The previous prime is 66127859533. The next prime is 66127859549. The reversal of 66127859547 is 74595872166.

It is a happy number.

It is not a de Polignac number, because 66127859547 - 2²⁶ = 66060750683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66127859549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1471708 + ... + 1515974.

It is an arithmetic number, because the mean of its divisors is an integer number (3904939304).

Almost surely, 2^66127859547 is an apocalyptic number.

66127859547 is a deficient number, since it is larger than the sum of its proper divisors (27590683749).

66127859547 is a wasteful number, since it uses less digits than its factorization.

66127859547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46027 (or 46010 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 60.

The spelling of 66127859547 in words is "sixty-six billion, one hundred twenty-seven million, eight hundred fifty-nine thousand, five hundred forty-seven".