266006665221205 has 32 divisors (see below), whose sum is σ = 338432614771680. Its totient is φ = 200022156042240.

The previous prime is 266006665221127. The next prime is 266006665221371. The reversal of 266006665221205 is 502122566600662.

266006665221205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 16 ways, for example, as 36066774935844 + 229939890285361 = 6005562^2 + 15163769^2 .

It is not a de Polignac number, because 266006665221205 - 2¹³ = 266006665213013 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 467453391 + ... + 468022099.

It is an arithmetic number, because the mean of its divisors is an integer number (10576019211615).

Almost surely, 2^{266006665221205} is an apocalyptic number.

It is an amenable number.

266006665221205 is a deficient number, since it is larger than the sum of its proper divisors (72425949550475).

266006665221205 is a wasteful number, since it uses less digits than its factorization.

266006665221205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576009.

The product of its (nonzero) digits is 3110400, while the sum is 49.

The spelling of 266006665221205 in words is "two hundred sixty-six trillion, six billion, six hundred sixty-five million, two hundred twenty-one thousand, two hundred five".