266240404266 has 16 divisors (see below), whose sum is σ = 532493496288. Its totient is φ = 88744686800.

The previous prime is 266240404253. The next prime is 266240404303. The reversal of 266240404266 is 662404042662.

It is a super-2 number, since 2×266240404266² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244080 + ... + 769451.

It is an arithmetic number, because the mean of its divisors is an integer number (33280843518).

Almost surely, 2^266240404266 is an apocalyptic number.

266240404266 is an abundant number, since it is smaller than the sum of its proper divisors (266253092022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266240404266 is a wasteful number, since it uses less digits than its factorization.

266240404266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057317.

The product of its (nonzero) digits is 663552, while the sum is 42.

The spelling of 266240404266 in words is "two hundred sixty-six billion, two hundred forty million, four hundred four thousand, two hundred sixty-six".