266605056 has 120 divisors (see below), whose sum is σ = 786449664. Its totient is φ = 86906880.

The previous prime is 266605037. The next prime is 266605057. The reversal of 266605056 is 650506662.

266605056 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 266605056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266605057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 215961 + ... + 217191.

Almost surely, 2^266605056 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 266605056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (393224832).

266605056 is an abundant number, since it is smaller than the sum of its proper divisors (519844608).

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

266605056 is a wasteful number, since it uses less digits than its factorization.

266605056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302 (or 1283 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 266605056 is about 16328.0450758809. The cubic root of 266605056 is about 643.6100155485.

The spelling of 266605056 in words is "two hundred sixty-six million, six hundred five thousand, fifty-six".