266022216 has 96 divisors (see below), whose sum is σ = 734643000. Its totient is φ = 86952960.

The previous prime is 266022187. The next prime is 266022217. The reversal of 266022216 is 612220662.

266022216 is a `hidden beast` number, since 26 + 602 + 22 + 16 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 101002500 + 165019716 = 10050^2 + 12846^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 266022216.

It is not an unprimeable number, because it can be changed into a prime (266022217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1469646 + ... + 1469826.

Almost surely, 2^266022216 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 266022216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367321500).

266022216 is an abundant number, since it is smaller than the sum of its proper divisors (468620784).

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

266022216 is a wasteful number, since it uses less digits than its factorization.

266022216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 266022216 is about 16310.1874912583. The cubic root of 266022216 is about 643.1406629193.

Adding to 266022216 its reverse (612220662), we get a palindrome (878242878).

The spelling of 266022216 in words is "two hundred sixty-six million, twenty-two thousand, two hundred sixteen".