16601161 has 4 divisors (see below), whose sum is σ = 16610500. Its totient is φ = 16591824.

The previous prime is 16601159. The next prime is 16601171. The reversal of 16601161 is 16110661.

16601161 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 brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 9418761 + 7182400 = 3069^2 + 2680^2 .

It is a cyclic number.

It is not a de Polignac number, because 16601161 - 2¹ = 16601159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16601131) 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, 1086 + ... + 5863.

It is an arithmetic number, because the mean of its divisors is an integer number (4152625).

Almost surely, 2^16601161 is an apocalyptic number.

It is an amenable number.

16601161 is a deficient number, since it is larger than the sum of its proper divisors (9339).

16601161 is an equidigital number, since it uses as much as digits as its factorization.

16601161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9338.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 16601161 is about 4074.4522331229. The cubic root of 16601161 is about 255.1013873393.

The spelling of 16601161 in words is "sixteen million, six hundred one thousand, one hundred sixty-one".