13066416581 has 16 divisors (see below), whose sum is σ = 13729314240. Its totient is φ = 12417968640.

The previous prime is 13066416521. The next prime is 13066416589. The reversal of 13066416581 is 18561466031.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13066416581 is a prime.

It is a super-2 number, since 2×13066416581² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13066416589) 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, 4916405 + ... + 4919061.

It is an arithmetic number, because the mean of its divisors is an integer number (858082140).

Almost surely, 2^13066416581 is an apocalyptic number.

It is an amenable number.

13066416581 is a deficient number, since it is larger than the sum of its proper divisors (662897659).

13066416581 is a wasteful number, since it uses less digits than its factorization.

13066416581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5284.

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 13066416581 in words is "thirteen billion, sixty-six million, four hundred sixteen thousand, five hundred eighty-one".