663245615 has 8 divisors (see below), whose sum is σ = 796757040. Its totient is φ = 530021632.

The previous prime is 663245587. The next prime is 663245659. The reversal of 663245615 is 516542366.

It is a happy number.

663245615 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 663245615 - 2¹⁶ = 663180079 is a prime.

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, 66749 + ... + 76038.

It is an arithmetic number, because the mean of its divisors is an integer number (99594630).

Almost surely, 2^663245615 is an apocalyptic number.

663245615 is a deficient number, since it is larger than the sum of its proper divisors (133511425).

663245615 is a wasteful number, since it uses less digits than its factorization.

663245615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143721.

The product of its digits is 129600, while the sum is 38.

The square root of 663245615 is about 25753.5553856162. Note that the first 3 decimals coincide. The cubic root of 663245615 is about 872.0836194641.

The spelling of 663245615 in words is "six hundred sixty-three million, two hundred forty-five thousand, six hundred fifteen".