668219 has 8 divisors (see below), whose sum is σ = 738720. Its totient is φ = 601216.

The previous prime is 668209. The next prime is 668221. The reversal of 668219 is 912866.

668219 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 668219 - 2⁴ = 668203 is a prime.

It is a super-2 number, since 2×668219² = 893033263922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668209) 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, 464 + ... + 1245.

It is an arithmetic number, because the mean of its divisors is an integer number (92340).

2⁶⁶⁸²¹⁹ is an apocalyptic number.

668219 is a deficient number, since it is larger than the sum of its proper divisors (70501).

668219 is a wasteful number, since it uses less digits than its factorization.

668219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749.

The product of its digits is 5184, while the sum is 32.

The square root of 668219 is about 817.4466343438. The cubic root of 668219 is about 87.4257983178.

The spelling of 668219 in words is "six hundred sixty-eight thousand, two hundred nineteen".