665796 has 24 divisors (see below), whose sum is σ = 1570464. Its totient is φ = 219520.

The previous prime is 665789. The next prime is 665801. The reversal of 665796 is 697566.

It is a happy number.

It is a plaindrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 665796.

It is an unprimeable number.

665796 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1111 + ... + 1601.

It is an arithmetic number, because the mean of its divisors is an integer number (65436).

2⁶⁶⁵⁷⁹⁶ is an apocalyptic number.

It is an amenable number.

665796 is an abundant number, since it is smaller than the sum of its proper divisors (904668).

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

665796 is a wasteful number, since it uses less digits than its factorization.

665796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611 (or 609 counting only the distinct ones).

The product of its digits is 68040, while the sum is 39.

The square root of 665796 is about 815.9632344659. The cubic root of 665796 is about 87.3200000364.

The spelling of 665796 in words is "six hundred sixty-five thousand, seven hundred ninety-six".