266242779869 has 8 divisors (see below), whose sum is σ = 290666553600. Its totient is φ = 241855653600.

The previous prime is 266242779857. The next prime is 266242779871. The reversal of 266242779869 is 968977242662.

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

It is a de Polignac number, because none of the positive numbers 2^k-266242779869 is a prime.

It is a super-3 number, since 3×266242779869³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 266242779799 and 266242779808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266242770869) 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, 9146669 + ... + 9175730.

It is an arithmetic number, because the mean of its divisors is an integer number (36333319200).

Almost surely, 2^266242779869 is an apocalyptic number.

It is an amenable number.

266242779869 is a deficient number, since it is larger than the sum of its proper divisors (24423773731).

266242779869 is a wasteful number, since it uses less digits than its factorization.

266242779869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18323731.

The product of its digits is 219469824, while the sum is 68.

The spelling of 266242779869 in words is "two hundred sixty-six billion, two hundred forty-two million, seven hundred seventy-nine thousand, eight hundred sixty-nine".