668229 has 8 divisors (see below), whose sum is σ = 894912. Its totient is φ = 443520.

The previous prime is 668221. The next prime is 668243. The reversal of 668229 is 922866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 668229 - 2³ = 668221 is a prime.

668229 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 668229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 744 + ... + 1374.

It is an arithmetic number, because the mean of its divisors is an integer number (111864).

2⁶⁶⁸²²⁹ is an apocalyptic number.

It is an amenable number.

668229 is a deficient number, since it is larger than the sum of its proper divisors (226683).

668229 is a wasteful number, since it uses less digits than its factorization.

668229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987.

The product of its digits is 10368, while the sum is 33.

The square root of 668229 is about 817.4527509281. The cubic root of 668229 is about 87.4262344291.

The spelling of 668229 in words is "six hundred sixty-eight thousand, two hundred twenty-nine".