266126220000 has 720 divisors, whose sum is σ = 980029290240. Its totient is φ = 68439168000.

The previous prime is 266126219999. The next prime is 266126220011. The reversal of 266126220000 is 22621662.

266126220000 is a `hidden beast` number, since 26 + 6 + 12 + 622 + 0 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 702179811 + ... + 702180189.

It is an arithmetic number, because the mean of its divisors is an integer number (1361151792).

Almost surely, 2^266126220000 is an apocalyptic number.

266126220000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266126220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (490014645120).

266126220000 is an abundant number, since it is smaller than the sum of its proper divisors (713903070240).

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

266126220000 is a wasteful number, since it uses less digits than its factorization.

266126220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545 (or 519 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 266126220000 its reverse (22621662), we get a palindrome (266148841662).

The spelling of 266126220000 in words is "two hundred sixty-six billion, one hundred twenty-six million, two hundred twenty thousand".