13066978196781 has 24 divisors (see below), whose sum is σ = 18981077398400. Its totient is φ = 8662194367200.

The previous prime is 13066978196747. The next prime is 13066978196873. The reversal of 13066978196781 is 18769187966031.

13066978196781 is a `hidden beast` number, since 1 + 306 + 6 + 97 + 81 + 96 + 78 + 1 = 666.

It is not a de Polignac number, because 13066978196781 - 2¹⁵ = 13066978164013 is a prime.

It is a super-2 number, since 2×13066978196781² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13066978195781) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 652776 + ... + 5153646.

Almost surely, 2^{13066978196781} is an apocalyptic number.

It is an amenable number.

13066978196781 is a deficient number, since it is larger than the sum of its proper divisors (5914099201619).

13066978196781 is a wasteful number, since it uses less digits than its factorization.

13066978196781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4502697 (or 4502694 counting only the distinct ones).

The product of its (nonzero) digits is 164602368, while the sum is 72.

The spelling of 13066978196781 in words is "thirteen trillion, sixty-six billion, nine hundred seventy-eight million, one hundred ninety-six thousand, seven hundred eighty-one".