266640033 has 16 divisors (see below), whose sum is σ = 396861696. Its totient is φ = 157841040.

The previous prime is 266640001. The next prime is 266640037. The reversal of 266640033 is 330046662.

It is not a de Polignac number, because 266640033 - 2⁵ = 266640001 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (266640037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92535 + ... + 95372.

It is an arithmetic number, because the mean of its divisors is an integer number (24803856).

Almost surely, 2^266640033 is an apocalyptic number.

It is an amenable number.

266640033 is a deficient number, since it is larger than the sum of its proper divisors (130221663).

266640033 is a wasteful number, since it uses less digits than its factorization.

266640033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187964.

The product of its (nonzero) digits is 15552, while the sum is 30.

The square root of 266640033 is about 16329.1161120252. The cubic root of 266640033 is about 643.6381602549.

Adding to 266640033 its reverse (330046662), we get a palindrome (596686695).

The spelling of 266640033 in words is "two hundred sixty-six million, six hundred forty thousand, thirty-three".