663530166 has 72 divisors (see below), whose sum is σ = 1583557560. Its totient is φ = 200648448.

The previous prime is 663530159. The next prime is 663530167. The reversal of 663530166 is 661035366.

It is a happy number.

663530166 is a `hidden beast` number, since 6 + 63 + 530 + 1 + 66 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 663530166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663530167) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 177630 + ... + 181326.

It is an arithmetic number, because the mean of its divisors is an integer number (21993855).

Almost surely, 2^663530166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663530166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (791778780).

663530166 is an abundant number, since it is smaller than the sum of its proper divisors (920027394).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663530166 is a wasteful number, since it uses less digits than its factorization.

663530166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3790 (or 3774 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The square root of 663530166 is about 25759.0792925524. The cubic root of 663530166 is about 872.2083177562.

The spelling of 663530166 in words is "six hundred sixty-three million, five hundred thirty thousand, one hundred sixty-six".