266812034801 has 4 divisors (see below), whose sum is σ = 287336037492. Its totient is φ = 246288032112.

The previous prime is 266812034729. The next prime is 266812034803. The reversal of 266812034801 is 108430218662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 108430218662 = 2 ⋅54215109331.

It can be written as a sum of positive squares in 2 ways, for example, as 163600834576 + 103211200225 = 404476^2 + 321265^2 .

It is a cyclic number.

It is not a de Polignac number, because 266812034801 - 2¹⁸ = 266811772657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266812034803) by changing a digit.

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, 10262001326 + ... + 10262001351.

It is an arithmetic number, because the mean of its divisors is an integer number (71834009373).

Almost surely, 2^266812034801 is an apocalyptic number.

It is an amenable number.

266812034801 is a deficient number, since it is larger than the sum of its proper divisors (20524002691).

266812034801 is a wasteful number, since it uses less digits than its factorization.

266812034801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20524002690.

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 266812034801 in words is "two hundred sixty-six billion, eight hundred twelve million, thirty-four thousand, eight hundred one".