266577035138 has 18 divisors (see below), whose sum is σ = 413215621353. Its totient is φ = 128977935360.

The previous prime is 266577035113. The next prime is 266577035177. The reversal of 266577035138 is 831530775662.

It can be written as a sum of positive squares in 2 ways, for example, as 255422084449 + 11154950689 = 505393^2 + 105617^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=365087.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 266577035138.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 22629506 + ... + 22641282.

Almost surely, 2^266577035138 is an apocalyptic number.

266577035138 is a deficient number, since it is larger than the sum of its proper divisors (146638586215).

266577035138 is an frugal number, since it uses more digits than its factorization.

266577035138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23618 (or 11810 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 53.

The spelling of 266577035138 in words is "two hundred sixty-six billion, five hundred seventy-seven million, thirty-five thousand, one hundred thirty-eight".