163668446 has 4 divisors (see below), whose sum is σ = 245502672. Its totient is φ = 81834222.

The previous prime is 163668443. The next prime is 163668457. The reversal of 163668446 is 644866361.

163668446 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 junction number, because it is equal to n+sod(n) for n = 163668397 and 163668406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163668443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40917110 + ... + 40917113.

It is an arithmetic number, because the mean of its divisors is an integer number (61375668).

Almost surely, 2^163668446 is an apocalyptic number.

163668446 is a deficient number, since it is larger than the sum of its proper divisors (81834226).

163668446 is an equidigital number, since it uses as much as digits as its factorization.

163668446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81834225.

The product of its digits is 497664, while the sum is 44.

The square root of 163668446 is about 12793.2969167451. The cubic root of 163668446 is about 547.0012510736.

The spelling of 163668446 in words is "one hundred sixty-three million, six hundred sixty-eight thousand, four hundred forty-six".