266669311905 has 12 divisors (see below), whose sum is σ = 462226807380. Its totient is φ = 142223632992.

The previous prime is 266669311897. The next prime is 266669311913. The reversal of 266669311905 is 509113966662.

It is an interprime number because it is at equal distance from previous prime (266669311897) and next prime (266669311913).

It can be written as a sum of positive squares in 2 ways, for example, as 53189274384 + 213480037521 = 230628^2 + 462039^2 .

It is not a de Polignac number, because 266669311905 - 2³ = 266669311897 is a prime.

It is a super-2 number, since 2×266669311905² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2962992310 + ... + 2962992399.

It is an arithmetic number, because the mean of its divisors is an integer number (38518900615).

Almost surely, 2^266669311905 is an apocalyptic number.

It is an amenable number.

266669311905 is a deficient number, since it is larger than the sum of its proper divisors (195557495475).

266669311905 is a wasteful number, since it uses less digits than its factorization.

266669311905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5925984720 (or 5925984717 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 54.

The spelling of 266669311905 in words is "two hundred sixty-six billion, six hundred sixty-nine million, three hundred eleven thousand, nine hundred five".