669344 has 24 divisors (see below), whose sum is σ = 1420020. Its totient is φ = 308736.

The previous prime is 669329. The next prime is 669359. The reversal of 669344 is 443966.

It is an interprime number because it is at equal distance from previous prime (669329) and next prime (669359).

It can be written as a sum of positive squares in 2 ways, for example, as 659344 + 10000 = 812^2 + 100^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 669344.

It is an unprimeable number.

669344 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, 389 + ... + 1220.

2⁶⁶⁹³⁴⁴ is an apocalyptic number.

It is an amenable number.

669344 is an abundant number, since it is smaller than the sum of its proper divisors (750676).

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

669344 is a wasteful number, since it uses less digits than its factorization.

669344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632 (or 1624 counting only the distinct ones).

The product of its digits is 15552, while the sum is 32.

The square root of 669344 is about 818.1344632761. The cubic root of 669344 is about 87.4748335787.

It can be divided in two parts, 6693 and 44, that multiplied together give a palindrome (294492).

The spelling of 669344 in words is "six hundred sixty-nine thousand, three hundred forty-four".