266486772160 has 224 divisors, whose sum is σ = 794367077760. Its totient is φ = 83026771968.

The previous prime is 266486772133. The next prime is 266486772161. The reversal of 266486772160 is 61277684662.

It is a happy number.

266486772160 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266486772161) 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 31 ways as a sum of consecutive naturals, for example, 983664 + ... + 1224976.

Almost surely, 2^266486772160 is an apocalyptic number.

266486772160 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 266486772160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (397183538880).

266486772160 is an abundant number, since it is smaller than the sum of its proper divisors (527880305600).

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

266486772160 is a wasteful number, since it uses less digits than its factorization.

266486772160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241383 (or 241373 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 55.

The spelling of 266486772160 in words is "two hundred sixty-six billion, four hundred eighty-six million, seven hundred seventy-two thousand, one hundred sixty".