669024 has 72 divisors (see below), whose sum is σ = 2004912. Its totient is φ = 211200.

The previous prime is 669023. The next prime is 669029. The reversal of 669024 is 420966.

669024 is nontrivially palindromic in base 11.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×669024² = 895186225152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669023) 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, 6574 + ... + 6674.

It is an arithmetic number, because the mean of its divisors is an integer number (27846).

2⁶⁶⁹⁰²⁴ 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 669024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1002456).

669024 is an abundant number, since it is smaller than the sum of its proper divisors (1335888).

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

669024 is a wasteful number, since it uses less digits than its factorization.

669024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 669024 is about 817.9388730217. The cubic root of 669024 is about 87.4608913663.

The spelling of 669024 in words is "six hundred sixty-nine thousand, twenty-four".