163666144 has 24 divisors (see below), whose sum is σ = 324029160. Its totient is φ = 81373056.

The previous prime is 163666141. The next prime is 163666163. The reversal of 163666144 is 441666361.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163666141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8559 + ... + 20014.

It is an arithmetic number, because the mean of its divisors is an integer number (13501215).

Almost surely, 2^163666144 is an apocalyptic number.

It is an amenable number.

163666144 is a deficient number, since it is larger than the sum of its proper divisors (160363016).

163666144 is a wasteful number, since it uses less digits than its factorization.

163666144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28762 (or 28754 counting only the distinct ones).

The product of its digits is 62208, while the sum is 37.

The square root of 163666144 is about 12793.2069474389. The cubic root of 163666144 is about 546.9986865337.

It can be divided in two parts, 16366614 and 4, that multiplied together give a palindrome (65466456).

The spelling of 163666144 in words is "one hundred sixty-three million, six hundred sixty-six thousand, one hundred forty-four".