663487444784366 has 4 divisors (see below), whose sum is σ = 995231167176552. Its totient is φ = 331743722392182.

The previous prime is 663487444784363. The next prime is 663487444784401.

663487444784366 is nontrivially palindromic in base 10.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663487444784363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165871861196090 + ... + 165871861196093.

It is an arithmetic number, because the mean of its divisors is an integer number (248807791794138).

Almost surely, 2^{663487444784366} is an apocalyptic number.

663487444784366 is a deficient number, since it is larger than the sum of its proper divisors (331743722392186).

663487444784366 is a wasteful number, since it uses less digits than its factorization.

663487444784366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331743722392185.

The product of its digits is 37456183296, while the sum is 80.

The spelling of 663487444784366 in words is "six hundred sixty-three trillion, four hundred eighty-seven billion, four hundred forty-four million, seven hundred eighty-four thousand, three hundred sixty-six".