266121126 has 20 divisors (see below), whose sum is σ = 596308812. Its totient is φ = 88706988.

The previous prime is 266121113. The next prime is 266121127. The reversal of 266121126 is 621121662.

266121126 is a `hidden beast` number, since 26 + 612 + 1 + 1 + 26 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 266121126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266121127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 821200 + ... + 821523.

Almost surely, 2^266121126 is an apocalyptic number.

266121126 is an abundant number, since it is smaller than the sum of its proper divisors (330187686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266121126 is a wasteful number, since it uses less digits than its factorization.

266121126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642737 (or 1642728 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 266121126 is about 16313.2193634488. The cubic root of 266121126 is about 643.2203619779.

Adding to 266121126 its reverse (621121662), we get a palindrome (887242788).

The spelling of 266121126 in words is "two hundred sixty-six million, one hundred twenty-one thousand, one hundred twenty-six".