266313663 has 96 divisors (see below), whose sum is σ = 510461952. Its totient is φ = 134719200.

The previous prime is 266313631. The next prime is 266313667. The reversal of 266313663 is 366313662.

It is a happy number.

266313663 is a `hidden beast` number, since 266 + 31 + 366 + 3 = 666.

266313663 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 266313663 - 2⁵ = 266313631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266313667) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 804408 + ... + 804738.

It is an arithmetic number, because the mean of its divisors is an integer number (5317312).

Almost surely, 2^266313663 is an apocalyptic number.

266313663 is a deficient number, since it is larger than the sum of its proper divisors (244148289).

266313663 is a wasteful number, since it uses less digits than its factorization.

266313663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407 (or 395 counting only the distinct ones).

The product of its digits is 69984, while the sum is 36.

The square root of 266313663 is about 16319.1195534563. The cubic root of 266313663 is about 643.3754465766.

Subtracting 266313663 from its reverse (366313662), we obtain a palindrome (99999999).

The spelling of 266313663 in words is "two hundred sixty-six million, three hundred thirteen thousand, six hundred sixty-three".