266712664 has 16 divisors (see below), whose sum is σ = 500511600. Its totient is φ = 133242912.

The previous prime is 266712661. The next prime is 266712737. The reversal of 266712664 is 466217662.

It is a super-2 number, since 2×266712664² = 142271290275953792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266712661) 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 3 ways as a sum of consecutive naturals, for example, 3732 + ... + 23395.

It is an arithmetic number, because the mean of its divisors is an integer number (31281975).

Almost surely, 2^266712664 is an apocalyptic number.

It is an amenable number.

266712664 is a deficient number, since it is larger than the sum of its proper divisors (233798936).

266712664 is a wasteful number, since it uses less digits than its factorization.

266712664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28362 (or 28358 counting only the distinct ones).

The product of its digits is 145152, while the sum is 40.

The square root of 266712664 is about 16331.3399327796. The cubic root of 266712664 is about 643.6965958903.

The spelling of 266712664 in words is "two hundred sixty-six million, seven hundred twelve thousand, six hundred sixty-four".