306668 has 6 divisors (see below), whose sum is σ = 536676. Its totient is φ = 153332.

The previous prime is 306661. The next prime is 306689. The reversal of 306668 is 866603.

It is a self number, because there is not a number n which added to its sum of digits gives 306668.

It is not an unprimeable number, because it can be changed into a prime (306661) by changing a digit.

306668 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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38330 + ... + 38337.

It is an arithmetic number, because the mean of its divisors is an integer number (89446).

2³⁰⁶⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

306668 is a deficient number, since it is larger than the sum of its proper divisors (230008).

306668 is a wasteful number, since it uses less digits than its factorization.

306668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76671 (or 76669 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 306668 is about 553.7761280518. The cubic root of 306668 is about 67.4356405292.

The spelling of 306668 in words is "three hundred six thousand, six hundred sixty-eight".