669212 has 12 divisors (see below), whose sum is σ = 1177176. Its totient is φ = 332880.

The previous prime is 669181. The next prime is 669241. The reversal of 669212 is 212966.

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 669212.

It is an unprimeable number.

669212 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, 887 + ... + 1457.

It is an arithmetic number, because the mean of its divisors is an integer number (98098).

2⁶⁶⁹²¹² is an apocalyptic number.

It is an amenable number.

669212 is a deficient number, since it is larger than the sum of its proper divisors (507964).

669212 is a wasteful number, since it uses less digits than its factorization.

669212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868 (or 866 counting only the distinct ones).

The product of its digits is 1296, while the sum is 26.

The square root of 669212 is about 818.0537879626. The cubic root of 669212 is about 87.4690829547.

The spelling of 669212 in words is "six hundred sixty-nine thousand, two hundred twelve".