266435985 has 16 divisors (see below), whose sum is σ = 451374336. Its totient is φ = 133740288.

The previous prime is 266435941. The next prime is 266435987. The reversal of 266435985 is 589534662.

It is not a de Polignac number, because 266435985 - 2¹⁹ = 265911697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (266435987) 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 15 ways as a sum of consecutive naturals, for example, 522169 + ... + 522678.

It is an arithmetic number, because the mean of its divisors is an integer number (28210896).

Almost surely, 2^266435985 is an apocalyptic number.

It is an amenable number.

266435985 is a deficient number, since it is larger than the sum of its proper divisors (184938351).

266435985 is a wasteful number, since it uses less digits than its factorization.

266435985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044872.

The product of its digits is 1555200, while the sum is 48.

The square root of 266435985 is about 16322.8669356826. The cubic root of 266435985 is about 643.4739356094.

The spelling of 266435985 in words is "two hundred sixty-six million, four hundred thirty-five thousand, nine hundred eighty-five".