663606366 has 16 divisors (see below), whose sum is σ = 1336122000. Its totient is φ = 219717248.

The previous prime is 663606319. The next prime is 663606371.

663606366 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 7 ways as a sum of consecutive naturals, for example, 370251 + ... + 372038.

It is an arithmetic number, because the mean of its divisors is an integer number (83507625).

Almost surely, 2^663606366 is an apocalyptic number.

663606366 is an abundant number, since it is smaller than the sum of its proper divisors (672515634).

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

663606366 is a wasteful number, since it uses less digits than its factorization.

663606366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742443.

The product of its (nonzero) digits is 419904, while the sum is 42.

The square root of 663606366 is about 25760.5583402224. The cubic root of 663606366 is about 872.2417046984.

The spelling of 663606366 in words is "six hundred sixty-three million, six hundred six thousand, three hundred sixty-six".