663166 has 24 divisors (see below), whose sum is σ = 1186056. Its totient is φ = 277200.

The previous prime is 663163. The next prime is 663167. The reversal of 663166 is 661366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6516 + ... + 6616.

It is an arithmetic number, because the mean of its divisors is an integer number (49419).

2⁶⁶³¹⁶⁶ is an apocalyptic number.

663166 is a deficient number, since it is larger than the sum of its proper divisors (522890).

663166 is a wasteful number, since it uses less digits than its factorization.

663166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 177 counting only the distinct ones).

The product of its digits is 3888, while the sum is 28.

The square root of 663166 is about 814.3500475840. The cubic root of 663166 is about 87.2048723535.

The spelling of 663166 in words is "six hundred sixty-three thousand, one hundred sixty-six".