266688294911 has 4 divisors (see below), whose sum is σ = 278283438192. Its totient is φ = 255093151632.

The previous prime is 266688294889. The next prime is 266688294959. The reversal of 266688294911 is 119492886662.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 266688294911 - 2²² = 266684100607 is a prime.

It is a super-2 number, since 2×266688294911² (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 (266688294011) 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, 5797571606 + ... + 5797571651.

It is an arithmetic number, because the mean of its divisors is an integer number (69570859548).

Almost surely, 2^266688294911 is an apocalyptic number.

266688294911 is a deficient number, since it is larger than the sum of its proper divisors (11595143281).

266688294911 is a wasteful number, since it uses less digits than its factorization.

266688294911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11595143280.

The product of its digits is 17915904, while the sum is 62.

The spelling of 266688294911 in words is "two hundred sixty-six billion, six hundred eighty-eight million, two hundred ninety-four thousand, nine hundred eleven".