663730789478 has 4 divisors (see below), whose sum is σ = 995596184220. Its totient is φ = 331865394738.

The previous prime is 663730789459. The next prime is 663730789517. The reversal of 663730789478 is 874987037366.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165932697368 + ... + 165932697371.

It is an arithmetic number, because the mean of its divisors is an integer number (248899046055).

Almost surely, 2^663730789478 is an apocalyptic number.

663730789478 is a deficient number, since it is larger than the sum of its proper divisors (331865394742).

663730789478 is a wasteful number, since it uses less digits than its factorization.

663730789478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331865394741.

The product of its (nonzero) digits is 256048128, while the sum is 68.

The spelling of 663730789478 in words is "six hundred sixty-three billion, seven hundred thirty million, seven hundred eighty-nine thousand, four hundred seventy-eight".