663909366 has 16 divisors (see below), whose sum is σ = 1340711424. Its totient is φ = 219154344.

The previous prime is 663909349. The next prime is 663909371.

663909366 is nontrivially palindromic in base 10.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536526 + ... + 537761.

It is an arithmetic number, because the mean of its divisors is an integer number (83794464).

Almost surely, 2^663909366 is an apocalyptic number.

663909366 is an abundant number, since it is smaller than the sum of its proper divisors (676802058).

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

663909366 is a wasteful number, since it uses less digits than its factorization.

663909366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074395.

The product of its (nonzero) digits is 944784, while the sum is 48.

The square root of 663909366 is about 25766.4387527652. The cubic root of 663909366 is about 872.3744385176.

The spelling of 663909366 in words is "six hundred sixty-three million, nine hundred nine thousand, three hundred sixty-six".