680168 has 8 divisors (see below), whose sum is σ = 1275330. Its totient is φ = 340080.

The previous prime is 680161. The next prime is 680177. The reversal of 680168 is 861086.

It can be written as a sum of positive squares in only one way, i.e., 611524 + 68644 = 782^2 + 262^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 680168.

It is not an unprimeable number, because it can be changed into a prime (680161) by changing a digit.

680168 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, 42503 + ... + 42518.

2⁶⁸⁰¹⁶⁸ is an apocalyptic number.

It is an amenable number.

680168 is a deficient number, since it is larger than the sum of its proper divisors (595162).

680168 is a wasteful number, since it uses less digits than its factorization.

680168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85027 (or 85023 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 680168 is about 824.7229837952. The cubic root of 680168 is about 87.9438346840.

It can be divided in two parts, 680 and 168, that added together give a palindrome (848).

The spelling of 680168 in words is "six hundred eighty thousand, one hundred sixty-eight".