266959253664 has 72 divisors (see below), whose sum is σ = 767695399380. Its totient is φ = 87986562048.

The previous prime is 266959253647. The next prime is 266959253689. The reversal of 266959253664 is 466352959662.

266959253664 is a `hidden beast` number, since 2 + 6 + 6 + 9 + 5 + 92 + 536 + 6 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 264586784400 + 2372469264 = 514380^2 + 48708^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5181907 + ... + 5233170.

Almost surely, 2^266959253664 is an apocalyptic number.

266959253664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

266959253664 is an abundant number, since it is smaller than the sum of its proper divisors (500736145716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266959253664 is a wasteful number, since it uses less digits than its factorization.

266959253664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10415182 (or 10415171 counting only the distinct ones).

The product of its digits is 125971200, while the sum is 63.

The spelling of 266959253664 in words is "two hundred sixty-six billion, nine hundred fifty-nine million, two hundred fifty-three thousand, six hundred sixty-four".