660844163 has 16 divisors (see below), whose sum is σ = 760608000. Its totient is φ = 562437216.

The previous prime is 660844157. The next prime is 660844181. The reversal of 660844163 is 361448066.

It is a cyclic number.

It is not a de Polignac number, because 660844163 - 2²⁸ = 392408707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660844103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 967220 + ... + 967902.

It is an arithmetic number, because the mean of its divisors is an integer number (47538000).

Almost surely, 2^660844163 is an apocalyptic number.

660844163 is a deficient number, since it is larger than the sum of its proper divisors (99763837).

660844163 is a wasteful number, since it uses less digits than its factorization.

660844163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 660844163 is about 25706.8894073165. The cubic root of 660844163 is about 871.0298119390.

The spelling of 660844163 in words is "six hundred sixty million, eight hundred forty-four thousand, one hundred sixty-three".