13346664561 has 12 divisors (see below), whose sum is σ = 19550044800. Its totient is φ = 8772455160.

The previous prime is 13346664553. The next prime is 13346664563. The reversal of 13346664561 is 16546664331.

13346664561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13346664561 - 2³ = 13346664553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13346664563) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 10442761 + ... + 10444038.

It is an arithmetic number, because the mean of its divisors is an integer number (1629170400).

Almost surely, 2^13346664561 is an apocalyptic number.

It is an amenable number.

13346664561 is a deficient number, since it is larger than the sum of its proper divisors (6203380239).

13346664561 is a wasteful number, since it uses less digits than its factorization.

13346664561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20886876 (or 20886873 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

The spelling of 13346664561 in words is "thirteen billion, three hundred forty-six million, six hundred sixty-four thousand, five hundred sixty-one".