663319940456 has 16 divisors (see below), whose sum is σ = 1243735308900. Its totient is φ = 331657191424.

The previous prime is 663319940449. The next prime is 663319940467. The reversal of 663319940456 is 654049913366.

It can be written as a sum of positive squares in 2 ways, for example, as 659938517956 + 3381422500 = 812366^2 + 58150^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 953906 + ... + 1495518.

Almost surely, 2^663319940456 is an apocalyptic number.

It is an amenable number.

663319940456 is a deficient number, since it is larger than the sum of its proper divisors (580415368444).

663319940456 is a wasteful number, since it uses less digits than its factorization.

663319940456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694708 (or 694704 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 56.

The spelling of 663319940456 in words is "six hundred sixty-three billion, three hundred nineteen million, nine hundred forty thousand, four hundred fifty-six".