16601166666611 has 4 divisors (see below), whose sum is σ = 17577705882312. Its totient is φ = 15624627450912.

The previous prime is 16601166666569. The next prime is 16601166666629. The reversal of 16601166666611 is 11666666110661.

It is a happy number.

16601166666611 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.

It is a cyclic number.

It is not a de Polignac number, because 16601166666611 - 2¹⁴ = 16601166650227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16601166666631) 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, 488269607825 + ... + 488269607858.

It is an arithmetic number, because the mean of its divisors is an integer number (4394426470578).

Almost surely, 2^{16601166666611} is an apocalyptic number.

16601166666611 is a deficient number, since it is larger than the sum of its proper divisors (976539215701).

16601166666611 is an equidigital number, since it uses as much as digits as its factorization.

16601166666611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976539215700.

The product of its (nonzero) digits is 1679616, while the sum is 53.

The spelling of 16601166666611 in words is "sixteen trillion, six hundred one billion, one hundred sixty-six million, six hundred sixty-six thousand, six hundred eleven".