663075656 has 8 divisors (see below), whose sum is σ = 1243266870. Its totient is φ = 331537824.

The previous prime is 663075649. The next prime is 663075659. The reversal of 663075656 is 656570366.

663075656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 439573156 + 223502500 = 20966^2 + 14950^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (663075659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41442221 + ... + 41442236.

Almost surely, 2^663075656 is an apocalyptic number.

It is an amenable number.

663075656 is a deficient number, since it is larger than the sum of its proper divisors (580191214).

663075656 is a wasteful number, since it uses less digits than its factorization.

663075656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82884463 (or 82884459 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 44.

The square root of 663075656 is about 25750.2554550435. The cubic root of 663075656 is about 872.0091216115.

The spelling of 663075656 in words is "six hundred sixty-three million, seventy-five thousand, six hundred fifty-six".