665696 has 24 divisors (see below), whose sum is σ = 1333584. Its totient is φ = 327040.

The previous prime is 665677. The next prime is 665713. The reversal of 665696 is 696566.

It is a congruent number.

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, 2126 + ... + 2418.

It is an arithmetic number, because the mean of its divisors is an integer number (55566).

2⁶⁶⁵⁶⁹⁶ is an apocalyptic number.

It is an amenable number.

665696 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

665696 is a wasteful number, since it uses less digits than its factorization.

665696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 366 counting only the distinct ones).

The product of its digits is 58320, while the sum is 38.

The square root of 665696 is about 815.9019548941. The cubic root of 665696 is about 87.3156281080.

The spelling of 665696 in words is "six hundred sixty-five thousand, six hundred ninety-six".