669328 has 20 divisors (see below), whose sum is σ = 1415088. Its totient is φ = 304160.

The previous prime is 669311. The next prime is 669329. The reversal of 669328 is 823966.

It is a happy number.

It is a d-powerful number, because it can be written as 6 + 6⁶ + 3¹⁰ + 9⁴ + 2¹⁹ + 8⁵ .

It is a junction number, because it is equal to n+sod(n) for n = 669293 and 669302.

It is not an unprimeable number, because it can be changed into a prime (669329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1726 + ... + 2077.

2⁶⁶⁹³²⁸ is an apocalyptic number.

It is an amenable number.

669328 is an abundant number, since it is smaller than the sum of its proper divisors (745760).

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

669328 is a wasteful number, since it uses less digits than its factorization.

669328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3822 (or 3816 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 669328 is about 818.1246848739. The cubic root of 669328 is about 87.4741365737.

The spelling of 669328 in words is "six hundred sixty-nine thousand, three hundred twenty-eight".