266044220 has 96 divisors (see below), whose sum is σ = 665013888. Its totient is φ = 88399872.

The previous prime is 266044211. The next prime is 266044253. The reversal of 266044220 is 22440662.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 266044220.

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 31 ways as a sum of consecutive naturals, for example, 100352 + ... + 102968.

It is an arithmetic number, because the mean of its divisors is an integer number (6927228).

Almost surely, 2^266044220 is an apocalyptic number.

266044220 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 266044220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332506944).

266044220 is an abundant number, since it is smaller than the sum of its proper divisors (398969668).

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

266044220 is a wasteful number, since it uses less digits than its factorization.

266044220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2679 (or 2677 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 266044220 is about 16310.8620250433. The cubic root of 266044220 is about 643.1583948681.

Adding to 266044220 its reverse (22440662), we get a palindrome (288484882).

The spelling of 266044220 in words is "two hundred sixty-six million, forty-four thousand, two hundred twenty".