266216256 has 42 divisors (see below), whose sum is σ = 763062482. Its totient is φ = 88738560.

The previous prime is 266216231. The next prime is 266216267. The reversal of 266216256 is 652612662.

266216256 is a `hidden beast` number, since 2 + 6 + 6 + 21 + 625 + 6 = 666.

266216256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 141134400 + 125081856 = 11880^2 + 11184^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 266216256.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 230515 + ... + 231666.

Almost surely, 2^266216256 is an apocalyptic number.

It is an amenable number.

266216256 is an abundant number, since it is smaller than the sum of its proper divisors (496846226).

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

266216256 is a wasteful number, since it uses less digits than its factorization.

266216256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462199 (or 462186 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 266216256 is about 16316.1348364127. The cubic root of 266216256 is about 643.2969965845.

The spelling of 266216256 in words is "two hundred sixty-six million, two hundred sixteen thousand, two hundred fifty-six".