266054035405 has 4 divisors (see below), whose sum is σ = 319264842492. Its totient is φ = 212843228320.

The previous prime is 266054035399. The next prime is 266054035441. The reversal of 266054035405 is 504530450662.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 193377424009 + 72676611396 = 439747^2 + 269586^2 .

It is not a de Polignac number, because 266054035405 - 2⁹ = 266054034893 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

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, 26605403536 + ... + 26605403545.

It is an arithmetic number, because the mean of its divisors is an integer number (79816210623).

Almost surely, 2^266054035405 is an apocalyptic number.

It is an amenable number.

266054035405 is a deficient number, since it is larger than the sum of its proper divisors (53210807087).

266054035405 is an equidigital number, since it uses as much as digits as its factorization.

266054035405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53210807086.

The product of its (nonzero) digits is 432000, while the sum is 40.

The spelling of 266054035405 in words is "two hundred sixty-six billion, fifty-four million, thirty-five thousand, four hundred five".