663791048 has 12 divisors (see below), whose sum is σ = 1244744865. Its totient is φ = 331859088.

The previous prime is 663791047. The next prime is 663791057. The reversal of 663791048 is 840197366.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 541865284 + 121925764 = 23278^2 + 11042^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=18218.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663791047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 68318 + ... + 77426.

Almost surely, 2^663791048 is an apocalyptic number.

It is an amenable number.

663791048 is a deficient number, since it is larger than the sum of its proper divisors (580953817).

663791048 is an frugal number, since it uses more digits than its factorization.

663791048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18224 (or 9111 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 663791048 is about 25764.1426793130. The cubic root of 663791048 is about 872.3226123014.

The spelling of 663791048 in words is "six hundred sixty-three million, seven hundred ninety-one thousand, forty-eight".