266811583055 has 4 divisors (see below), whose sum is σ = 320173899672. Its totient is φ = 213449266440.

The previous prime is 266811583009. The next prime is 266811583061. The reversal of 266811583055 is 550385118662.

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

It is not a de Polignac number, because 266811583055 - 2⁶ = 266811582991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 266811582994 and 266811583012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26681158301 + ... + 26681158310.

It is an arithmetic number, because the mean of its divisors is an integer number (80043474918).

Almost surely, 2^266811583055 is an apocalyptic number.

266811583055 is a deficient number, since it is larger than the sum of its proper divisors (53362316617).

266811583055 is an equidigital number, since it uses as much as digits as its factorization.

266811583055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53362316616.

The product of its (nonzero) digits is 1728000, while the sum is 50.

The spelling of 266811583055 in words is "two hundred sixty-six billion, eight hundred eleven million, five hundred eighty-three thousand, fifty-five".