663864745 has 8 divisors (see below), whose sum is σ = 815164416. Its totient is φ = 518740656.

The previous prime is 663864689. The next prime is 663864757. The reversal of 663864745 is 547468366.

663864745 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 663864745 - 2¹⁵ = 663831977 is a prime.

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, 1543657 + ... + 1544086.

It is an arithmetic number, because the mean of its divisors is an integer number (101895552).

Almost surely, 2^663864745 is an apocalyptic number.

It is an amenable number.

663864745 is a deficient number, since it is larger than the sum of its proper divisors (151299671).

663864745 is a wasteful number, since it uses less digits than its factorization.

663864745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3087791.

The product of its digits is 2903040, while the sum is 49.

The square root of 663864745 is about 25765.5728638041. The cubic root of 663864745 is about 872.3548941370.

The spelling of 663864745 in words is "six hundred sixty-three million, eight hundred sixty-four thousand, seven hundred forty-five".