2266616881 has 3 divisors (see below), whose sum is σ = 2266664491. Its totient is φ = 2266569272.

The previous prime is 2266616861. The next prime is 2266616917. The reversal of 2266616881 is 1886166622.

The square root of 2266616881 is 47609.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1211666481 + 1054950400 = 34809^2 + 32480^2 .

It is not a de Polignac number, because 2266616881 - 2¹³ = 2266608689 is a prime.

It is a super-2 number, since 2×2266616881² = 10275104170468336322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2266616861) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 23805 + ... + 71413.

Almost surely, 2^2266616881 is an apocalyptic number.

2266616881 is the 47609-th square number.

2266616881 is the 23805-th centered octagonal number.

It is an amenable number.

2266616881 is a deficient number, since it is larger than the sum of its proper divisors (47610).

2266616881 is an frugal number, since it uses more digits than its factorization.

2266616881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95218 (or 47609 counting only the distinct ones).

The product of its digits is 331776, while the sum is 46.

The cubic root of 2266616881 is about 1313.5886066974.

Multiplying 2266616881 by its product of digits (331776), we get a square (752009082310656 = 27422784²).

The spelling of 2266616881 in words is "two billion, two hundred sixty-six million, six hundred sixteen thousand, eight hundred eighty-one".