663501216 has 48 divisors (see below), whose sum is σ = 1990505664. Its totient is φ = 189571584.

The previous prime is 663501199. The next prime is 663501221. The reversal of 663501216 is 612105366.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 493005 + ... + 494348.

It is an arithmetic number, because the mean of its divisors is an integer number (41468868).

Almost surely, 2^663501216 is an apocalyptic number.

It is an amenable number.

663501216 is an abundant number, since it is smaller than the sum of its proper divisors (1327004448).

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

663501216 is a wasteful number, since it uses less digits than its factorization.

663501216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987373 (or 987365 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 663501216 is about 25758.5173486364. The cubic root of 663501216 is about 872.1956326771.

The spelling of 663501216 in words is "six hundred sixty-three million, five hundred one thousand, two hundred sixteen".