66571070117 has 8 divisors (see below), whose sum is σ = 72206211672. Its totient is φ = 61126950400.

The previous prime is 66571070047. The next prime is 66571070129. The reversal of 66571070117 is 71107017566.

It can be written as a sum of positive squares in 4 ways, for example, as 1142034436 + 65429035681 = 33794^2 + 255791^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66571070117 - 2²⁰ = 66570021541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66571070417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47754734 + ... + 47756127.

It is an arithmetic number, because the mean of its divisors is an integer number (9025776459).

Almost surely, 2^66571070117 is an apocalyptic number.

It is an amenable number.

66571070117 is a deficient number, since it is larger than the sum of its proper divisors (5635141555).

66571070117 is a wasteful number, since it uses less digits than its factorization.

66571070117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95510919.

The product of its (nonzero) digits is 61740, while the sum is 41.

The spelling of 66571070117 in words is "sixty-six billion, five hundred seventy-one million, seventy thousand, one hundred seventeen".