266341220 has 24 divisors (see below), whose sum is σ = 578604600. Its totient is φ = 102862592.

The previous prime is 266341217. The next prime is 266341223. The reversal of 266341220 is 22143662.

It is an interprime number because it is at equal distance from previous prime (266341217) and next prime (266341223).

It can be written as a sum of positive squares in 4 ways, for example, as 2408704 + 263932516 = 1552^2 + 16246^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 266341220.

It is not an unprimeable number, because it can be changed into a prime (266341223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229025 + ... + 230184.

It is an arithmetic number, because the mean of its divisors is an integer number (24108525).

Almost surely, 2^266341220 is an apocalyptic number.

266341220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266341220 is an abundant number, since it is smaller than the sum of its proper divisors (312263380).

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

266341220 is a wasteful number, since it uses less digits than its factorization.

266341220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459247 (or 459245 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 266341220 is about 16319.9638479992. The cubic root of 266341220 is about 643.3976370587.

Adding to 266341220 its reverse (22143662), we get a palindrome (288484882).

The spelling of 266341220 in words is "two hundred sixty-six million, three hundred forty-one thousand, two hundred twenty".