266540819244 has 36 divisors (see below), whose sum is σ = 723467939544. Its totient is φ = 76154519616.

The previous prime is 266540819183. The next prime is 266540819309. The reversal of 266540819244 is 442918045662.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 226649769 + ... + 226650944.

It is an arithmetic number, because the mean of its divisors is an integer number (20096331654).

Almost surely, 2^266540819244 is an apocalyptic number.

It is an amenable number.

266540819244 is an abundant number, since it is smaller than the sum of its proper divisors (456927120300).

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

266540819244 is a wasteful number, since it uses less digits than its factorization.

266540819244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453300734 (or 453300725 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 51.

The spelling of 266540819244 in words is "two hundred sixty-six billion, five hundred forty million, eight hundred nineteen thousand, two hundred forty-four".