266783089056 has 96 divisors (see below), whose sum is σ = 790313630400. Its totient is φ = 78055649280.

The previous prime is 266783089021. The next prime is 266783089127. The reversal of 266783089056 is 650980387662.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×266783089056² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

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, 4325161 + ... + 4386408.

It is an arithmetic number, because the mean of its divisors is an integer number (8232433650).

Almost surely, 2^266783089056 is an apocalyptic number.

It is an amenable number.

266783089056 is an abundant number, since it is smaller than the sum of its proper divisors (523530541344).

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

266783089056 is a wasteful number, since it uses less digits than its factorization.

266783089056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8711622 (or 8711614 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 60.

The spelling of 266783089056 in words is "two hundred sixty-six billion, seven hundred eighty-three million, eighty-nine thousand, fifty-six".