266783382 has 52 divisors (see below), whose sum is σ = 602653716. Its totient is φ = 88573500.

The previous prime is 266783381. The next prime is 266783393. The reversal of 266783382 is 283387662.

266783382 is a `hidden beast` number, since 266 + 7 + 8 + 3 + 382 = 666.

It is a super-2 number, since 2×266783382² = 142346745822715848, which contains 22 as substring.

Its product of digits (580608) is a multiple of the sum of its prime divisors (256).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266783381) 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 25 ways as a sum of consecutive naturals, for example, 1062757 + ... + 1063007.

Almost surely, 2^266783382 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266783382, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301326858).

266783382 is an abundant number, since it is smaller than the sum of its proper divisors (335870334).

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

266783382 is an frugal number, since it uses more digits than its factorization.

266783382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289 (or 256 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 266783382 is about 16333.5048902555. The cubic root of 266783382 is about 643.7534822195.

The spelling of 266783382 in words is "two hundred sixty-six million, seven hundred eighty-three thousand, three hundred eighty-two".