669924 has 24 divisors (see below), whose sum is σ = 1737120. Its totient is φ = 223272.

The previous prime is 669923. The next prime is 669931. The reversal of 669924 is 429966.

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

It is a nude number because it is divisible by every one of its digits.

It is a d-powerful number, because it can be written as 6 + 6⁶ + 9⁵ + 9⁶ + 2¹⁵ + 4 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 669924.

It is not an unprimeable number, because it can be changed into a prime (669923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2994 + ... + 3209.

It is an arithmetic number, because the mean of its divisors is an integer number (72380).

2⁶⁶⁹⁹²⁴ is an apocalyptic number.

It is an amenable number.

669924 is an abundant number, since it is smaller than the sum of its proper divisors (1067196).

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

669924 is a wasteful number, since it uses less digits than its factorization.

669924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6216 (or 6208 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 669924 is about 818.4888514818. The cubic root of 669924 is about 87.5000925169.

The spelling of 669924 in words is "six hundred sixty-nine thousand, nine hundred twenty-four".