266491296 has 144 divisors (see below), whose sum is σ = 805188384. Its totient is φ = 86655744.

The previous prime is 266491273. The next prime is 266491297. The reversal of 266491296 is 692194662.

266491296 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 (144).

It is a super-2 number, since 2×266491296² = 142035221687519232, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (266491297) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 333970 + ... + 334766.

It is an arithmetic number, because the mean of its divisors is an integer number (5591586).

Almost surely, 2^266491296 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 266491296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (402594192).

266491296 is an abundant number, since it is smaller than the sum of its proper divisors (538697088).

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

266491296 is an equidigital number, since it uses as much as digits as its factorization.

266491296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865 (or 845 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 266491296 is about 16324.5611273320. The cubic root of 266491296 is about 643.5184600309.

The spelling of 266491296 in words is "two hundred sixty-six million, four hundred ninety-one thousand, two hundred ninety-six".