266075856 has 60 divisors (see below), whose sum is σ = 749700900. Its totient is φ = 88089600.

The previous prime is 266075851. The next prime is 266075869. The reversal of 266075856 is 658570662.

266075856 is a `hidden beast` number, since 2 + 6 + 60 + 7 + 585 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 62157456 + 203918400 = 7884^2 + 14280^2 .

It is a super-2 number, since 2×266075856² = 141592722292265472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266075851) 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, 15256 + ... + 27656.

It is an arithmetic number, because the mean of its divisors is an integer number (12495015).

Almost surely, 2^266075856 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 266075856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (374850450).

266075856 is an abundant number, since it is smaller than the sum of its proper divisors (483625044).

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

266075856 is a wasteful number, since it uses less digits than its factorization.

266075856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12564 (or 12555 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The square root of 266075856 is about 16311.8317794170. The cubic root of 266075856 is about 643.1838870620.

The spelling of 266075856 in words is "two hundred sixty-six million, seventy-five thousand, eight hundred fifty-six".