266321408 has 40 divisors (see below), whose sum is σ = 535847400. Its totient is φ = 132229120.

The previous prime is 266321401. The next prime is 266321431. The reversal of 266321408 is 804123662.

266321408 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266321401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74543 + ... + 78033.

It is an arithmetic number, because the mean of its divisors is an integer number (13396185).

Almost surely, 2^266321408 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 266321408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267923700).

266321408 is an abundant number, since it is smaller than the sum of its proper divisors (269525992).

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

266321408 is an equidigital number, since it uses as much as digits as its factorization.

266321408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3658 (or 3642 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 266321408 is about 16319.3568500722. The cubic root of 266321408 is about 643.3816834509.

The spelling of 266321408 in words is "two hundred sixty-six million, three hundred twenty-one thousand, four hundred eight".