669867588 has 72 divisors (see below), whose sum is σ = 1865992128. Its totient is φ = 201313728.

The previous prime is 669867581. The next prime is 669867589. The reversal of 669867588 is 885768966.

It is not an unprimeable number, because it can be changed into a prime (669867581) by changing a digit.

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, 3481 + ... + 36767.

Almost surely, 2^669867588 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 669867588, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (932996064).

669867588 is an abundant number, since it is smaller than the sum of its proper divisors (1196124540).

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

669867588 is a wasteful number, since it uses less digits than its factorization.

669867588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33353 (or 33348 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The square root of 669867588 is about 25881.8003237796. The cubic root of 669867588 is about 874.9763642051.

The spelling of 669867588 in words is "six hundred sixty-nine million, eight hundred sixty-seven thousand, five hundred eighty-eight".