266540832 has 72 divisors (see below), whose sum is σ = 775638864. Its totient is φ = 86776704.

The previous prime is 266540831. The next prime is 266540863. The reversal of 266540832 is 238045662.

266540832 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 (72).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (266540831) 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, 1623 + ... + 23145.

It is an arithmetic number, because the mean of its divisors is an integer number (10772762).

Almost surely, 2^266540832 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 266540832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (387819432).

266540832 is an abundant number, since it is smaller than the sum of its proper divisors (509098032).

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

266540832 is a wasteful number, since it uses less digits than its factorization.

266540832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21582 (or 21571 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 266540832 is about 16326.0782798564. The cubic root of 266540832 is about 643.5583304456.

The spelling of 266540832 in words is "two hundred sixty-six million, five hundred forty thousand, eight hundred thirty-two".