266782223231 has 4 divisors (see below), whose sum is σ = 278381450352.
Its totient is φ = 255182996112.
The previous prime is 266782223189. The next prime is 266782223243. The reversal of 266782223231 is 132322287662.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 266782223231 - 218 = 266781961087 is a prime.
It is a super-2 number, since 2×2667822232312 (a number of 24 digits) contains 22 as substring.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (266782223831) 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, 5799613526 + ... + 5799613571.
It is an arithmetic number, because the mean of its divisors is an integer number (69595362588).
Almost surely, 2266782223231 is an apocalyptic number.
266782223231 is a deficient number, since it is larger than the sum of its proper divisors (11599227121).
266782223231 is a wasteful number, since it uses less digits than its factorization.
266782223231 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 11599227120.
The product of its digits is 580608, while the sum is 44.
The spelling of 266782223231 in words is "two hundred sixty-six billion, seven hundred eighty-two million, two hundred twenty-three thousand, two hundred thirty-one".