266464081 has 4 divisors (see below), whose sum is σ = 286961332. Its totient is φ = 245966832.

The previous prime is 266464073. The next prime is 266464097. The reversal of 266464081 is 180464662.

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 57517056 + 208947025 = 7584^2 + 14455^2 .

It is a cyclic number.

It is not a de Polignac number, because 266464081 - 2³ = 266464073 is a prime.

It is a super-2 number, since 2×266464081² = 142006212926349122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 266464081.

It is not an unprimeable number, because it can be changed into a prime (266464021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10248606 + ... + 10248631.

It is an arithmetic number, because the mean of its divisors is an integer number (71740333).

Almost surely, 2^266464081 is an apocalyptic number.

It is an amenable number.

266464081 is a deficient number, since it is larger than the sum of its proper divisors (20497251).

266464081 is a wasteful number, since it uses less digits than its factorization.

266464081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20497250.

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 266464081 is about 16323.7275461213. The cubic root of 266464081 is about 643.4965531852.

The spelling of 266464081 in words is "two hundred sixty-six million, four hundred sixty-four thousand, eighty-one".