669612 has 24 divisors (see below), whose sum is σ = 1601712. Its totient is φ = 217600.

The previous prime is 669611. The next prime is 669637. The reversal of 669612 is 216966.

It is a self number, because there is not a number n which added to its sum of digits gives 669612.

It is not an unprimeable number, because it can be changed into a prime (669611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189 + ... + 1172.

It is an arithmetic number, because the mean of its divisors is an integer number (66738).

2⁶⁶⁹⁶¹² is an apocalyptic number.

It is an amenable number.

669612 is an abundant number, since it is smaller than the sum of its proper divisors (932100).

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

669612 is a wasteful number, since it uses less digits than its factorization.

669612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1409 (or 1407 counting only the distinct ones).

The product of its digits is 3888, while the sum is 30.

The square root of 669612 is about 818.2982341421. The cubic root of 669612 is about 87.4865067629.

The spelling of 669612 in words is "six hundred sixty-nine thousand, six hundred twelve".