663567745 has 4 divisors (see below), whose sum is σ = 796281300. Its totient is φ = 530854192.

The previous prime is 663567743. The next prime is 663567757. The reversal of 663567745 is 547765366.

663567745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 504631296 + 158936449 = 22464^2 + 12607^2 .

It is a cyclic number.

It is not a de Polignac number, because 663567745 - 2¹ = 663567743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (663567743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66356770 + ... + 66356779.

It is an arithmetic number, because the mean of its divisors is an integer number (199070325).

Almost surely, 2^663567745 is an apocalyptic number.

It is an amenable number.

663567745 is a deficient number, since it is larger than the sum of its proper divisors (132713555).

663567745 is a wasteful number, since it uses less digits than its factorization.

663567745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132713554.

The product of its digits is 3175200, while the sum is 49.

The square root of 663567745 is about 25759.8087143519. The cubic root of 663567745 is about 872.2247832712.

The spelling of 663567745 in words is "six hundred sixty-three million, five hundred sixty-seven thousand, seven hundred forty-five".