669852 has 36 divisors (see below), whose sum is σ = 1769040. Its totient is φ = 213312.

The previous prime is 669847. The next prime is 669853. The reversal of 669852 is 258966.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669853) by changing a digit.

669852 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 11 ways as a sum of consecutive naturals, for example, 424 + ... + 1232.

It is an arithmetic number, because the mean of its divisors is an integer number (49140).

2⁶⁶⁹⁸⁵² 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 669852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (884520).

669852 is an abundant number, since it is smaller than the sum of its proper divisors (1099188).

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

669852 is a wasteful number, since it uses less digits than its factorization.

669852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842 (or 837 counting only the distinct ones).

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

The square root of 669852 is about 818.4448668053. Note that the first 3 decimals coincide. The cubic root of 669852 is about 87.4969577174.

It can be divided in two parts, 669 and 852, that added together give a square (1521 = 39²).

The spelling of 669852 in words is "six hundred sixty-nine thousand, eight hundred fifty-two".