669629232 has 120 divisors (see below), whose sum is σ = 1919408400. Its totient is φ = 217864704.

The previous prime is 669629209. The next prime is 669629243. The reversal of 669629232 is 232926966.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2285278 + ... + 2285570.

It is an arithmetic number, because the mean of its divisors is an integer number (15995070).

Almost surely, 2^669629232 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 669629232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (959704200).

669629232 is an abundant number, since it is smaller than the sum of its proper divisors (1249779168).

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

669629232 is a wasteful number, since it uses less digits than its factorization.

669629232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635 (or 626 counting only the distinct ones).

The product of its digits is 419904, while the sum is 45.

The square root of 669629232 is about 25877.1952112280. The cubic root of 669629232 is about 874.8725722461.

The spelling of 669629232 in words is "six hundred sixty-nine million, six hundred twenty-nine thousand, two hundred thirty-two".