818668 has 6 divisors (see below), whose sum is σ = 1432676. Its totient is φ = 409332.

The previous prime is 818659. The next prime is 818683. The reversal of 818668 is 866818.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102330 + ... + 102337.

2⁸¹⁸⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

818668 is a deficient number, since it is larger than the sum of its proper divisors (614008).

818668 is a wasteful number, since it uses less digits than its factorization.

818668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204671 (or 204669 counting only the distinct ones).

The product of its digits is 18432, while the sum is 37.

The square root of 818668 is about 904.8027409331. The cubic root of 818668 is about 93.5483083221.

The spelling of 818668 in words is "eight hundred eighteen thousand, six hundred sixty-eight".