161324066 has 4 divisors (see below), whose sum is σ = 241986102. Its totient is φ = 80662032.

The previous prime is 161324039. The next prime is 161324081. The reversal of 161324066 is 660423161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 660423161 = 1279 ⋅516359.

It can be written as a sum of positive squares in only one way, i.e., 148328041 + 12996025 = 12179^2 + 3605^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40331015 + ... + 40331018.

Almost surely, 2^161324066 is an apocalyptic number.

161324066 is a deficient number, since it is larger than the sum of its proper divisors (80662036).

161324066 is an equidigital number, since it uses as much as digits as its factorization.

161324066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80662035.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 161324066 is about 12701.3411102923. The cubic root of 161324066 is about 544.3769396831.

The spelling of 161324066 in words is "one hundred sixty-one million, three hundred twenty-four thousand, sixty-six".