266145236 has 48 divisors (see below), whose sum is σ = 584693760. Its totient is φ = 103356000.

The previous prime is 266145223. The next prime is 266145247. The reversal of 266145236 is 632541662.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 266145196 and 266145205.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1361 + ... + 23111.

It is an arithmetic number, because the mean of its divisors is an integer number (12181120).

Almost surely, 2^266145236 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 266145236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292346880).

266145236 is an abundant number, since it is smaller than the sum of its proper divisors (318548524).

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

266145236 is a wasteful number, since it uses less digits than its factorization.

266145236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21804 (or 21802 counting only the distinct ones).

The product of its digits is 51840, while the sum is 35.

The square root of 266145236 is about 16313.9583179558. The cubic root of 266145236 is about 643.2397861838.

Adding to 266145236 its reverse (632541662), we get a palindrome (898686898).

The spelling of 266145236 in words is "two hundred sixty-six million, one hundred forty-five thousand, two hundred thirty-six".