669287432 has 64 divisors (see below), whose sum is σ = 1418376960. Its totient is φ = 293428800.

The previous prime is 669287431. The next prime is 669287441. The reversal of 669287432 is 234782966.

It is not an unprimeable number, because it can be changed into a prime (669287431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313007 + ... + 315137.

It is an arithmetic number, because the mean of its divisors is an integer number (22162140).

Almost surely, 2^669287432 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 669287432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (709188480).

669287432 is an abundant number, since it is smaller than the sum of its proper divisors (749089528).

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

669287432 is a wasteful number, since it uses less digits than its factorization.

669287432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2274 (or 2270 counting only the distinct ones).

The product of its digits is 870912, while the sum is 47.

The square root of 669287432 is about 25870.5900976379. The cubic root of 669287432 is about 874.7236926753.

The spelling of 669287432 in words is "six hundred sixty-nine million, two hundred eighty-seven thousand, four hundred thirty-two".