163665361 has 8 divisors (see below), whose sum is σ = 164851200. Its totient is φ = 162483552.

The previous prime is 163665347. The next prime is 163665367. The reversal of 163665361 is 163566361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163665361 - 2⁵ = 163665329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163665361.

It is not an unprimeable number, because it can be changed into a prime (163665367) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 171261 + ... + 172213.

It is an arithmetic number, because the mean of its divisors is an integer number (20606400).

Almost surely, 2^163665361 is an apocalyptic number.

It is an amenable number.

163665361 is a deficient number, since it is larger than the sum of its proper divisors (1185839).

163665361 is an equidigital number, since it uses as much as digits as its factorization.

163665361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015.

The product of its digits is 58320, while the sum is 37.

The square root of 163665361 is about 12793.1763452240. The cubic root of 163665361 is about 546.9978142281.

The spelling of 163665361 in words is "one hundred sixty-three million, six hundred sixty-five thousand, three hundred sixty-one".