266646742441 has 4 divisors (see below), whose sum is σ = 266671040400. Its totient is φ = 266622444484.

The previous prime is 266646742429. The next prime is 266646742487. The reversal of 266646742441 is 144247646662.

266646742441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 266646742441 - 2⁹ = 266646741929 is a prime.

It is a super-2 number, since 2×266646742441² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266646742541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12132511 + ... + 12154468.

It is an arithmetic number, because the mean of its divisors is an integer number (66667760100).

Almost surely, 2^266646742441 is an apocalyptic number.

It is an amenable number.

266646742441 is a deficient number, since it is larger than the sum of its proper divisors (24297959).

266646742441 is a wasteful number, since it uses less digits than its factorization.

266646742441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24297958.

The product of its digits is 9289728, while the sum is 52.

The spelling of 266646742441 in words is "two hundred sixty-six billion, six hundred forty-six million, seven hundred forty-two thousand, four hundred forty-one".