266242285 has 4 divisors (see below), whose sum is σ = 319490748. Its totient is φ = 212993824.

The previous prime is 266242271. The next prime is 266242297. The reversal of 266242285 is 582242662.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 139499721 + 126742564 = 11811^2 + 11258^2 .

It is a cyclic number.

It is not a de Polignac number, because 266242285 - 2²³ = 257853677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26624224 + ... + 26624233.

It is an arithmetic number, because the mean of its divisors is an integer number (79872687).

Almost surely, 2^266242285 is an apocalyptic number.

It is an amenable number.

266242285 is a deficient number, since it is larger than the sum of its proper divisors (53248463).

266242285 is an equidigital number, since it uses as much as digits as its factorization.

266242285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53248462.

The product of its digits is 92160, while the sum is 37.

The square root of 266242285 is about 16316.9324629356. The cubic root of 266242285 is about 643.3179617853.

The spelling of 266242285 in words is "two hundred sixty-six million, two hundred forty-two thousand, two hundred eighty-five".