13666485144961 has 32 divisors (see below), whose sum is σ = 15035449419648. Its totient is φ = 12318996119040.

The previous prime is 13666485144959. The next prime is 13666485144973. The reversal of 13666485144961 is 16944158466631.

It is a cyclic number.

It is not a de Polignac number, because 13666485144961 - 2¹ = 13666485144959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13666485144893 and 13666485144902.

It is not an unprimeable number, because it can be changed into a prime (13666485145961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3368616445 + ... + 3368620501.

It is an arithmetic number, because the mean of its divisors is an integer number (469857794364).

Almost surely, 2^{13666485144961} is an apocalyptic number.

13666485144961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13666485144961 is a deficient number, since it is larger than the sum of its proper divisors (1368964274687).

13666485144961 is a wasteful number, since it uses less digits than its factorization.

13666485144961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8161.

The product of its digits is 89579520, while the sum is 64.

The spelling of 13666485144961 in words is "thirteen trillion, six hundred sixty-six billion, four hundred eighty-five million, one hundred forty-four thousand, nine hundred sixty-one".