669206 has 4 divisors (see below), whose sum is σ = 1003812. Its totient is φ = 334602.

The previous prime is 669181. The next prime is 669241. The reversal of 669206 is 602966.

It is a happy number.

It is a semiprime because it is the product of two primes.

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 669206.

It is an unprimeable number.

669206 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 as a sum of consecutive naturals, namely, 167300 + ... + 167303.

It is an arithmetic number, because the mean of its divisors is an integer number (250953).

2⁶⁶⁹²⁰⁶ is an apocalyptic number.

669206 is a deficient number, since it is larger than the sum of its proper divisors (334606).

669206 is a wasteful number, since it uses less digits than its factorization.

669206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334605.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 669206 is about 818.0501207139. The cubic root of 669206 is about 87.4688215447.

The spelling of 669206 in words is "six hundred sixty-nine thousand, two hundred six".