669198 has 8 divisors (see below), whose sum is σ = 1338408. Its totient is φ = 223064.

The previous prime is 669181. The next prime is 669241. The reversal of 669198 is 891966.

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

669198 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 669198.

It is an unprimeable number.

669198 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 in 3 ways as a sum of consecutive naturals, for example, 55761 + ... + 55772.

It is an arithmetic number, because the mean of its divisors is an integer number (167301).

2⁶⁶⁹¹⁹⁸ is an apocalyptic number.

669198 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669198 is a wasteful number, since it uses less digits than its factorization.

669198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111538.

The product of its digits is 23328, while the sum is 39.

The square root of 669198 is about 818.0452310233. The cubic root of 669198 is about 87.4684729957.

The spelling of 669198 in words is "six hundred sixty-nine thousand, one hundred ninety-eight".