663612216 has 32 divisors (see below), whose sum is σ = 1663318800. Its totient is φ = 220632320.

The previous prime is 663612199. The next prime is 663612217. The reversal of 663612216 is 612216366.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663612217) 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, 26205 + ... + 44876.

Almost surely, 2^663612216 is an apocalyptic number.

It is an amenable number.

663612216 is an abundant number, since it is smaller than the sum of its proper divisors (999706584).

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

663612216 is a wasteful number, since it uses less digits than its factorization.

663612216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71479 (or 71475 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 663612216 is about 25760.6718856477. The cubic root of 663612216 is about 872.2442677635.

The spelling of 663612216 in words is "six hundred sixty-three million, six hundred twelve thousand, two hundred sixteen".