13266661531056 has 80 divisors (see below), whose sum is σ = 36345731724288. Its totient is φ = 4155493708800.

The previous prime is 13266661531051. The next prime is 13266661531087. The reversal of 13266661531056 is 65013516666231.

It is a super-2 number, since 2×13266661531056² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (13266661531051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12367960 + ... + 13397751.

Almost surely, 2^{13266661531056} is an apocalyptic number.

13266661531056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13266661531056 is an abundant number, since it is smaller than the sum of its proper divisors (23079070193232).

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

13266661531056 is a wasteful number, since it uses less digits than its factorization.

13266661531056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25766370 (or 25766364 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 51.

The spelling of 13266661531056 in words is "thirteen trillion, two hundred sixty-six billion, six hundred sixty-one million, five hundred thirty-one thousand, fifty-six".