668084 has 6 divisors (see below), whose sum is σ = 1169154. Its totient is φ = 334040.

The previous prime is 668069. The next prime is 668089. The reversal of 668084 is 480866.

It can be written as a sum of positive squares in only one way, i.e., 490000 + 178084 = 700^2 + 422^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 668084.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668089) by changing a digit.

668084 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83507 + ... + 83514.

It is an arithmetic number, because the mean of its divisors is an integer number (194859).

2⁶⁶⁸⁰⁸⁴ is an apocalyptic number.

It is an amenable number.

668084 is a deficient number, since it is larger than the sum of its proper divisors (501070).

668084 is a wasteful number, since it uses less digits than its factorization.

668084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167025 (or 167023 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 668084 is about 817.3640559751. The cubic root of 668084 is about 87.4199103890.

The spelling of 668084 in words is "six hundred sixty-eight thousand, eighty-four".