266366663 has 16 divisors (see below), whose sum is σ = 283785216. Its totient is φ = 249570720.

The previous prime is 266366647. The next prime is 266366677. The reversal of 266366663 is 366663662.

It is a cyclic number.

It is not a de Polignac number, because 266366663 - 2⁴ = 266366647 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266066663) 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, 301220 + ... + 302102.

It is an arithmetic number, because the mean of its divisors is an integer number (17736576).

Almost surely, 2^266366663 is an apocalyptic number.

266366663 is a deficient number, since it is larger than the sum of its proper divisors (17418553).

266366663 is a wasteful number, since it uses less digits than its factorization.

266366663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214.

The product of its digits is 839808, while the sum is 44.

The square root of 266366663 is about 16320.7433347872. The cubic root of 266366663 is about 643.4181238674.

The spelling of 266366663 in words is "two hundred sixty-six million, three hundred sixty-six thousand, six hundred sixty-three".