266939807809 has 8 divisors (see below), whose sum is σ = 267487672320. Its totient is φ = 266392036176.

The previous prime is 266939807759. The next prime is 266939807843. The reversal of 266939807809 is 908708939662.

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 266939807809 - 2¹¹ = 266939805761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266939807509) 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, 10802382 + ... + 10827064.

It is an arithmetic number, because the mean of its divisors is an integer number (33435959040).

Almost surely, 2^266939807809 is an apocalyptic number.

It is an amenable number.

266939807809 is a deficient number, since it is larger than the sum of its proper divisors (547864511).

266939807809 is a wasteful number, since it uses less digits than its factorization.

266939807809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46439.

The product of its (nonzero) digits is 70543872, while the sum is 67.

The spelling of 266939807809 in words is "two hundred sixty-six billion, nine hundred thirty-nine million, eight hundred seven thousand, eight hundred nine".