266505456 has 80 divisors (see below), whose sum is σ = 789235200. Its totient is φ = 75911424.

The previous prime is 266505451. The next prime is 266505493. The reversal of 266505456 is 654505662.

It is a happy number.

266505456 is digitally balanced in base 3, 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 (266505451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129685 + ... + 131723.

It is an arithmetic number, because the mean of its divisors is an integer number (9865440).

Almost surely, 2^266505456 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 266505456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (394617600).

266505456 is an abundant number, since it is smaller than the sum of its proper divisors (522729744).

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

266505456 is a wasteful number, since it uses less digits than its factorization.

266505456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2446 (or 2440 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 39.

The square root of 266505456 is about 16324.9948238889. The cubic root of 266505456 is about 643.5298576014.

The spelling of 266505456 in words is "two hundred sixty-six million, five hundred five thousand, four hundred fifty-six".