665164 has 12 divisors (see below), whose sum is σ = 1171800. Its totient is φ = 330368.

The previous prime is 665153. The next prime is 665177. The reversal of 665164 is 461566.

It is a plaindrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252 + ... + 1180.

It is an arithmetic number, because the mean of its divisors is an integer number (97650).

2⁶⁶⁵¹⁶⁴ is an apocalyptic number.

It is an amenable number.

665164 is a deficient number, since it is larger than the sum of its proper divisors (506636).

665164 is a wasteful number, since it uses less digits than its factorization.

665164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112 (or 1110 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 665164 is about 815.5758701678. The cubic root of 665164 is about 87.2923620858.

The spelling of 665164 in words is "six hundred sixty-five thousand, one hundred sixty-four".