266684452225 has 27 divisors (see below), whose sum is σ = 333123800457. Its totient is φ = 211787988480.

The previous prime is 266684452213. The next prime is 266684452241. The reversal of 266684452225 is 522254486662.

The square root of 266684452225 is 516415.

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

266684452225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 75299201649 + 191385250576 = 274407^2 + 437476^2 .

It is not a de Polignac number, because 266684452225 - 2²⁷ = 266550234497 is a prime.

It is a super-2 number, since 2×266684452225² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 462191137 + ... + 462191713.

Almost surely, 2^266684452225 is an apocalyptic number.

266684452225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

266684452225 is the 516415-th square number.

266684452225 is the 258208-th centered octagonal number.

It is an amenable number.

266684452225 is a deficient number, since it is larger than the sum of its proper divisors (66439348232).

266684452225 is an frugal number, since it uses more digits than its factorization.

266684452225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522 (or 761 counting only the distinct ones).

The product of its digits is 11059200, while the sum is 52.

The spelling of 266684452225 in words is "two hundred sixty-six billion, six hundred eighty-four million, four hundred fifty-two thousand, two hundred twenty-five".