669762432 has 192 divisors, whose sum is σ = 2037213360. Its totient is φ = 218972160.

The previous prime is 669762427. The next prime is 669762433. The reversal of 669762432 is 234267966.

669762432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669762433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1897168 + ... + 1897520.

Almost surely, 2^669762432 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 669762432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1018606680).

669762432 is an abundant number, since it is smaller than the sum of its proper divisors (1367450928).

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

669762432 is an equidigital number, since it uses as much as digits as its factorization.

669762432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443 (or 419 counting only the distinct ones).

The product of its digits is 653184, while the sum is 45.

The square root of 669762432 is about 25879.7687779470. The cubic root of 669762432 is about 874.9305771316.

The spelling of 669762432 in words is "six hundred sixty-nine million, seven hundred sixty-two thousand, four hundred thirty-two".