664491483 has 24 divisors (see below), whose sum is σ = 980818176. Its totient is φ = 433382400.

The previous prime is 664491431. The next prime is 664491491. The reversal of 664491483 is 384194466.

664491483 is a `hidden beast` number, since 66 + 449 + 148 + 3 = 666.

It is not a de Polignac number, because 664491483 - 2¹⁰ = 664490459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664491493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101691 + ... + 108027.

It is an arithmetic number, because the mean of its divisors is an integer number (40867424).

Almost surely, 2^664491483 is an apocalyptic number.

664491483 is a deficient number, since it is larger than the sum of its proper divisors (316326693).

664491483 is a wasteful number, since it uses less digits than its factorization.

664491483 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6595 (or 6592 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 664491483 is about 25777.7323091074. The cubic root of 664491483 is about 872.6293305601.

The spelling of 664491483 in words is "six hundred sixty-four million, four hundred ninety-one thousand, four hundred eighty-three".