266413645 has 4 divisors (see below), whose sum is σ = 319696380. Its totient is φ = 213130912.

The previous prime is 266413627. The next prime is 266413661. The reversal of 266413645 is 546314662.

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 132641289 + 133772356 = 11517^2 + 11566^2 .

It is a cyclic number.

It is not a de Polignac number, because 266413645 - 2¹⁷ = 266282573 is a prime.

It is a super-3 number, since 3×266413645³ (a number of 26 digits) contains 333 as substring.

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, 26641360 + ... + 26641369.

It is an arithmetic number, because the mean of its divisors is an integer number (79924095).

Almost surely, 2^266413645 is an apocalyptic number.

It is an amenable number.

266413645 is a deficient number, since it is larger than the sum of its proper divisors (53282735).

266413645 is an equidigital number, since it uses as much as digits as its factorization.

266413645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53282734.

The product of its digits is 103680, while the sum is 37.

The square root of 266413645 is about 16322.1826052768. The cubic root of 266413645 is about 643.4559505394.

The spelling of 266413645 in words is "two hundred sixty-six million, four hundred thirteen thousand, six hundred forty-five".