669576 has 32 divisors (see below), whose sum is σ = 1748160. Its totient is φ = 213312.

The previous prime is 669551. The next prime is 669577. The reversal of 669576 is 675966.

It is a happy number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 669576.

It is not an unprimeable number, because it can be changed into a prime (669577) by changing a digit.

669576 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, 55 + ... + 1158.

It is an arithmetic number, because the mean of its divisors is an integer number (54630).

2⁶⁶⁹⁵⁷⁶ 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 669576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (874080).

669576 is an abundant number, since it is smaller than the sum of its proper divisors (1078584).

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

669576 is a wasteful number, since it uses less digits than its factorization.

669576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245 (or 1241 counting only the distinct ones).

The product of its digits is 68040, while the sum is 39.

The square root of 669576 is about 818.2762369762. The cubic root of 669576 is about 87.4849389043.

The spelling of 669576 in words is "six hundred sixty-nine thousand, five hundred seventy-six".