663773660506 has 16 divisors (see below), whose sum is σ = 1123629395040. Its totient is φ = 291311324080.

The previous prime is 663773660489. The next prime is 663773660507. The reversal of 663773660506 is 605066377366.

It is not an unprimeable number, because it can be changed into a prime (663773660507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520198156 + ... + 520199431.

It is an arithmetic number, because the mean of its divisors is an integer number (70226837190).

Almost surely, 2^663773660506 is an apocalyptic number.

663773660506 is a deficient number, since it is larger than the sum of its proper divisors (459855734534).

663773660506 is a wasteful number, since it uses less digits than its factorization.

663773660506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040397629.

The product of its (nonzero) digits is 17146080, while the sum is 55.

The spelling of 663773660506 in words is "six hundred sixty-three billion, seven hundred seventy-three million, six hundred sixty thousand, five hundred six".