663985466 has 16 divisors (see below), whose sum is σ = 1031643648. Its totient is φ = 320178000.

The previous prime is 663985463. The next prime is 663985513. The reversal of 663985466 is 664589366.

It is not an unprimeable number, because it can be changed into a prime (663985463) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 110 + ... + 36441.

It is an arithmetic number, because the mean of its divisors is an integer number (64477728).

Almost surely, 2^663985466 is an apocalyptic number.

663985466 is a deficient number, since it is larger than the sum of its proper divisors (367658182).

663985466 is a wasteful number, since it uses less digits than its factorization.

663985466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36877.

The product of its digits is 5598720, while the sum is 53.

The square root of 663985466 is about 25767.9154376135. The cubic root of 663985466 is about 872.4077689498.

The spelling of 663985466 in words is "six hundred sixty-three million, nine hundred eighty-five thousand, four hundred sixty-six".