16641161 has 2 divisors, whose sum is σ = 16641162. Its totient is φ = 16641160.

The previous prime is 16641137. The next prime is 16641179. The reversal of 16641161 is 16114661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8410000 + 8231161 = 2900^2 + 2869^2 .

It is an emirp because it is prime and its reverse (16114661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16641161 - 2¹⁸ = 16379017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16641161.

It is not a weakly prime, because it can be changed into another prime (16641461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8320580 + 8320581.

It is an arithmetic number, because the mean of its divisors is an integer number (8320581).

Almost surely, 2^16641161 is an apocalyptic number.

It is an amenable number.

16641161 is a deficient number, since it is larger than the sum of its proper divisors (1).

16641161 is an equidigital number, since it uses as much as digits as its factorization.

16641161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 26.

The square root of 16641161 is about 4079.3579151626. The cubic root of 16641161 is about 255.3061093864.

The spelling of 16641161 in words is "sixteen million, six hundred forty-one thousand, one hundred sixty-one".