266864128 has 40 divisors (see below), whose sum is σ = 547656912. Its totient is φ = 129816576.

The previous prime is 266864123. The next prime is 266864137. The reversal of 266864128 is 821468662.

266864128 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 (266864123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11901 + ... + 25987.

Almost surely, 2^266864128 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 266864128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273828456).

266864128 is an abundant number, since it is smaller than the sum of its proper divisors (280792784).

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

266864128 is an equidigital number, since it uses as much as digits as its factorization.

266864128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14142 (or 14126 counting only the distinct ones).

The product of its digits is 221184, while the sum is 43.

The square root of 266864128 is about 16335.9764936168. The cubic root of 266864128 is about 643.8184228903.

The spelling of 266864128 in words is "two hundred sixty-six million, eight hundred sixty-four thousand, one hundred twenty-eight".