266275512157 has 4 divisors (see below), whose sum is σ = 281938777596. Its totient is φ = 250612246720.

The previous prime is 266275512127. The next prime is 266275512161. The reversal of 266275512157 is 751215572662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 751215572662 = 2 ⋅375607786331.

It can be written as a sum of positive squares in 2 ways, for example, as 214425489721 + 51850022436 = 463061^2 + 227706^2 .

It is a cyclic number.

It is not a de Polignac number, because 266275512157 - 2¹⁵ = 266275479389 is a prime.

It is a Smith number, since the sum of its digits (49) 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 self number, because there is not a number n which added to its sum of digits gives 266275512157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266275512127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7831632694 + ... + 7831632727.

It is an arithmetic number, because the mean of its divisors is an integer number (70484694399).

Almost surely, 2^266275512157 is an apocalyptic number.

It is an amenable number.

266275512157 is a deficient number, since it is larger than the sum of its proper divisors (15663265439).

266275512157 is a wasteful number, since it uses less digits than its factorization.

266275512157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15663265438.

The product of its digits is 1764000, while the sum is 49.

The spelling of 266275512157 in words is "two hundred sixty-six billion, two hundred seventy-five million, five hundred twelve thousand, one hundred fifty-seven".