669528 has 48 divisors (see below), whose sum is σ = 1923480. Its totient is φ = 209664.

The previous prime is 669527. The next prime is 669551. The reversal of 669528 is 825966.

669528 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

Its product of digits (25920) is a multiple of the sum of its prime factors (576).

It is a junction number, because it is equal to n+sod(n) for n = 669492 and 669501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 951 + ... + 1497.

2⁶⁶⁹⁵²⁸ is an apocalyptic number.

669528 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (961740).

669528 is an abundant number, since it is smaller than the sum of its proper divisors (1253952).

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

669528 is a wasteful number, since it uses less digits than its factorization.

669528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576 (or 569 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 669528 is about 818.2469065019. The cubic root of 669528 is about 87.4828483388.

The spelling of 669528 in words is "six hundred sixty-nine thousand, five hundred twenty-eight".