16661130307161 has 4 divisors (see below), whose sum is σ = 22214840409552. Its totient is φ = 11107420204772.

The previous prime is 16661130307043. The next prime is 16661130307189. The reversal of 16661130307161 is 16170303116661.

16661130307161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16661130307161 - 2⁴² = 12263083796057 is a prime.

It is a super-3 number, since 3×16661130307161³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (16661130307361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2776855051191 + ... + 2776855051196.

It is an arithmetic number, because the mean of its divisors is an integer number (5553710102388).

Almost surely, 2^{16661130307161} is an apocalyptic number.

It is an amenable number.

16661130307161 is a deficient number, since it is larger than the sum of its proper divisors (5553710102391).

16661130307161 is an equidigital number, since it uses as much as digits as its factorization.

16661130307161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5553710102390.

The product of its (nonzero) digits is 81648, while the sum is 42.

The spelling of 16661130307161 in words is "sixteen trillion, six hundred sixty-one billion, one hundred thirty million, three hundred seven thousand, one hundred sixty-one".