266320000 has 80 divisors (see below), whose sum is σ = 663186150. Its totient is φ = 106496000.

The previous prime is 266319973. The next prime is 266320007. The reversal of 266320000 is 23662.

It can be written as a sum of positive squares in 5 ways, for example, as 760384 + 265559616 = 872^2 + 16296^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 266320000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266320007) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 78336 + ... + 81664.

Almost surely, 2^266320000 is an apocalyptic number.

266320000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331593075).

266320000 is an abundant number, since it is smaller than the sum of its proper divisors (396866150).

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

266320000 is an frugal number, since it uses more digits than its factorization.

266320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3363 (or 3336 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 266320000 is about 16319.3137110603. The cubic root of 266320000 is about 643.3805496292.

Adding to 266320000 its reverse (23662), we get a palindrome (266343662).

The spelling of 266320000 in words is "two hundred sixty-six million, three hundred twenty thousand".