266239693157 has 12 divisors (see below), whose sum is σ = 282896161476. Its totient is φ = 250512913920.

The previous prime is 266239693147. The next prime is 266239693177. The reversal of 266239693157 is 751396932662.

It can be written as a sum of positive squares in 6 ways, for example, as 154977601 + 266084715556 = 12449^2 + 515834^2 .

It is not a de Polignac number, because 266239693157 - 2¹⁸ = 266239431013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 266239693096 and 266239693105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266239693147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1002923 + ... + 1240295.

It is an arithmetic number, because the mean of its divisors is an integer number (23574680123).

Almost surely, 2^266239693157 is an apocalyptic number.

It is an amenable number.

266239693157 is a deficient number, since it is larger than the sum of its proper divisors (16656468319).

266239693157 is a wasteful number, since it uses less digits than its factorization.

266239693157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241288 (or 241271 counting only the distinct ones).

The product of its digits is 22044960, while the sum is 59.

The spelling of 266239693157 in words is "two hundred sixty-six billion, two hundred thirty-nine million, six hundred ninety-three thousand, one hundred fifty-seven".