664134632 has 24 divisors (see below), whose sum is σ = 1448559810. Its totient is φ = 284628960.

The previous prime is 664134617. The next prime is 664134673. The reversal of 664134632 is 236431466.

It can be written as a sum of positive squares in only one way, i.e., 613354756 + 50779876 = 24766^2 + 7126^2 .

It is a junction number, because it is equal to n+sod(n) for n = 664134592 and 664134601.

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 5 ways as a sum of consecutive naturals, for example, 846719 + ... + 847502.

Almost surely, 2^664134632 is an apocalyptic number.

It is an amenable number.

664134632 is an abundant number, since it is smaller than the sum of its proper divisors (784425178).

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

664134632 is a wasteful number, since it uses less digits than its factorization.

664134632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694241 (or 1694230 counting only the distinct ones).

The product of its digits is 62208, while the sum is 35.

The square root of 664134632 is about 25770.8096884828. The cubic root of 664134632 is about 872.4730935893.

The spelling of 664134632 in words is "six hundred sixty-four million, one hundred thirty-four thousand, six hundred thirty-two".