664232066 has 16 divisors (see below), whose sum is σ = 1058565240. Its totient is φ = 311996160.

The previous prime is 664232057. The next prime is 664232083. The reversal of 664232066 is 660232466.

It can be written as a sum of positive squares in 4 ways, for example, as 645922225 + 18309841 = 25415^2 + 4279^2 .

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 7 ways as a sum of consecutive naturals, for example, 152615 + ... + 156906.

Almost surely, 2^664232066 is an apocalyptic number.

664232066 is a deficient number, since it is larger than the sum of its proper divisors (394333174).

664232066 is a wasteful number, since it uses less digits than its factorization.

664232066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309589.

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

The square root of 664232066 is about 25772.7000137743. The cubic root of 664232066 is about 872.5157578236.

The spelling of 664232066 in words is "six hundred sixty-four million, two hundred thirty-two thousand, sixty-six".