664163330 has 8 divisors (see below), whose sum is σ = 1195494012. Its totient is φ = 265665328.

The previous prime is 664163321. The next prime is 664163333. The reversal of 664163330 is 33361466.

It can be written as a sum of positive squares in 2 ways, for example, as 545549449 + 118613881 = 23357^2 + 10891^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×664163330² = 882225857833377800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (664163333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33208157 + ... + 33208176.

Almost surely, 2^664163330 is an apocalyptic number.

664163330 is a deficient number, since it is larger than the sum of its proper divisors (531330682).

664163330 is a wasteful number, since it uses less digits than its factorization.

664163330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66416340.

The product of its (nonzero) digits is 23328, while the sum is 32.

The square root of 664163330 is about 25771.3664752182. The cubic root of 664163330 is about 872.4856602542.

The spelling of 664163330 in words is "six hundred sixty-four million, one hundred sixty-three thousand, three hundred thirty".