663935616 has 80 divisors (see below), whose sum is σ = 1975892490. Its totient is φ = 221308416.

The previous prime is 663935593. The next prime is 663935617. The reversal of 663935616 is 616539366.

663935616 is a `hidden beast` number, since 6 + 639 + 3 + 5 + 6 + 1 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 660695616 + 3240000 = 25704^2 + 1800^2 .

It is not an unprimeable number, because it can be changed into a prime (663935617) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 21651 + ... + 42386.

Almost surely, 2^663935616 is an apocalyptic number.

It is an amenable number.

663935616 is an abundant number, since it is smaller than the sum of its proper divisors (1311956874).

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

663935616 is an equidigital number, since it uses as much as digits as its factorization.

663935616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64063 (or 64042 counting only the distinct ones).

The product of its digits is 524880, while the sum is 45.

The square root of 663935616 is about 25766.9481312786. The cubic root of 663935616 is about 872.3859358335.

The spelling of 663935616 in words is "six hundred sixty-three million, nine hundred thirty-five thousand, six hundred sixteen".