668696 has 16 divisors (see below), whose sum is σ = 1433040. Its totient is φ = 286560.

The previous prime is 668687. The next prime is 668699. The reversal of 668696 is 696866.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 668696.

It is not an unprimeable number, because it can be changed into a prime (668699) by changing a digit.

668696 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 3 ways as a sum of consecutive naturals, for example, 5915 + ... + 6026.

It is an arithmetic number, because the mean of its divisors is an integer number (89565).

2⁶⁶⁸⁶⁹⁶ is an apocalyptic number.

It is an amenable number.

668696 is an abundant number, since it is smaller than the sum of its proper divisors (764344).

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

668696 is a wasteful number, since it uses less digits than its factorization.

668696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11954 (or 11950 counting only the distinct ones).

The product of its digits is 93312, while the sum is 41.

The square root of 668696 is about 817.7383444599. The cubic root of 668696 is about 87.4465959839.

The spelling of 668696 in words is "six hundred sixty-eight thousand, six hundred ninety-six".