669536 has 48 divisors (see below), whose sum is σ = 1562400. Its totient is φ = 282240.

The previous prime is 669527. The next prime is 669551. The reversal of 669536 is 635966.

It is a junction number, because it is equal to n+sod(n) for n = 669496 and 669505.

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 669536.

It is an unprimeable number.

669536 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 7 ways as a sum of consecutive naturals, for example, 10946 + ... + 11006.

It is an arithmetic number, because the mean of its divisors is an integer number (32550).

2⁶⁶⁹⁵³⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (781200).

669536 is an abundant number, since it is smaller than the sum of its proper divisors (892864).

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

669536 is an equidigital number, since it uses as much as digits as its factorization.

669536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92 (or 70 counting only the distinct ones).

The product of its digits is 29160, while the sum is 35.

The square root of 669536 is about 818.2517949873. The cubic root of 669536 is about 87.4831967734.

The spelling of 669536 in words is "six hundred sixty-nine thousand, five hundred thirty-six".