266111405646064 has 160 divisors (see below), whose sum is σ = 605932005369600. Its totient is φ = 111940720404480.

The previous prime is 266111405646061. The next prime is 266111405646131. The reversal of 266111405646064 is 460646504111662.

266111405646064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266111405646061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19315722 + ... + 30088534.

It is an arithmetic number, because the mean of its divisors is an integer number (3787075033560).

Almost surely, 2^{266111405646064} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266111405646064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302966002684800).

266111405646064 is an abundant number, since it is smaller than the sum of its proper divisors (339820599723536).

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

266111405646064 is a wasteful number, since it uses less digits than its factorization.

266111405646064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10773023 (or 10773017 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 52.

The spelling of 266111405646064 in words is "two hundred sixty-six trillion, one hundred eleven billion, four hundred five million, six hundred forty-six thousand, sixty-four".