663444366 has 32 divisors (see below), whose sum is σ = 1430962848. Its totient is φ = 203850240.

The previous prime is 663444349. The next prime is 663444389.

663444366 is nontrivially palindromic in base 10.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 53770 + ... + 64946.

It is an arithmetic number, because the mean of its divisors is an integer number (44717589).

Almost surely, 2^663444366 is an apocalyptic number.

663444366 is an abundant number, since it is smaller than the sum of its proper divisors (767518482).

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

663444366 is a wasteful number, since it uses less digits than its factorization.

663444366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11956.

The product of its digits is 746496, while the sum is 42.

The square root of 663444366 is about 25757.4138065140. The cubic root of 663444366 is about 872.1707215256.

The spelling of 663444366 in words is "six hundred sixty-three million, four hundred forty-four thousand, three hundred sixty-six".