669132576 has 288 divisors, whose sum is σ = 2377589760. Its totient is φ = 180838656.

The previous prime is 669132547. The next prime is 669132593. The reversal of 669132576 is 675231966.

669132576 is a `hidden beast` number, since 6 + 69 + 13 + 2 + 576 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1033885 + ... + 1034531.

It is an arithmetic number, because the mean of its divisors is an integer number (8255520).

Almost surely, 2^669132576 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 669132576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1188794880).

669132576 is an abundant number, since it is smaller than the sum of its proper divisors (1708457184).

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

669132576 is a wasteful number, since it uses less digits than its factorization.

669132576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698 (or 678 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 669132576 is about 25867.5970279421. The cubic root of 669132576 is about 874.6562245721.

The spelling of 669132576 in words is "six hundred sixty-nine million, one hundred thirty-two thousand, five hundred seventy-six".