663655066 has 8 divisors (see below), whose sum is σ = 1047876480. Its totient is φ = 314362908.

The previous prime is 663655043. The next prime is 663655067. The reversal of 663655066 is 660556366.

It is a happy number.

663655066 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 not an unprimeable number, because it can be changed into a prime (663655067) 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, 8732266 + ... + 8732341.

It is an arithmetic number, because the mean of its divisors is an integer number (130984560).

Almost surely, 2^663655066 is an apocalyptic number.

663655066 is a deficient number, since it is larger than the sum of its proper divisors (384221414).

663655066 is a wasteful number, since it uses less digits than its factorization.

663655066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17464628.

The product of its (nonzero) digits is 583200, while the sum is 43.

The square root of 663655066 is about 25761.5035663682. The cubic root of 663655066 is about 872.2630412086.

The spelling of 663655066 in words is "six hundred sixty-three million, six hundred fifty-five thousand, sixty-six".