66317871117 has 16 divisors (see below), whose sum is σ = 89719200000. Its totient is φ = 43566429504.

The previous prime is 66317871071. The next prime is 66317871119. The reversal of 66317871117 is 71117871366.

66317871117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66317871117 - 2⁷ = 66317870989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66317871119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154242 + ... + 395507.

It is an arithmetic number, because the mean of its divisors is an integer number (5607450000).

Almost surely, 2^66317871117 is an apocalyptic number.

It is an amenable number.

66317871117 is a deficient number, since it is larger than the sum of its proper divisors (23401328883).

66317871117 is a wasteful number, since it uses less digits than its factorization.

66317871117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550340.

The product of its digits is 296352, while the sum is 48.

The spelling of 66317871117 in words is "sixty-six billion, three hundred seventeen million, eight hundred seventy-one thousand, one hundred seventeen".