266716727117 has 4 divisors (see below), whose sum is σ = 266846015040. Its totient is φ = 266587439196.

The previous prime is 266716727071. The next prime is 266716727129. The reversal of 266716727117 is 711727617662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 266716727117 - 2¹⁰ = 266716726093 is a prime.

It is a super-2 number, since 2×266716727117² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266716727317) 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, 64640867 + ... + 64644992.

It is an arithmetic number, because the mean of its divisors is an integer number (66711503760).

Almost surely, 2^266716727117 is an apocalyptic number.

It is an amenable number.

266716727117 is a deficient number, since it is larger than the sum of its proper divisors (129287923).

266716727117 is a wasteful number, since it uses less digits than its factorization.

266716727117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129287922.

The product of its digits is 2074464, while the sum is 53.

The spelling of 266716727117 in words is "two hundred sixty-six billion, seven hundred sixteen million, seven hundred twenty-seven thousand, one hundred seventeen".