663451122568 has 32 divisors (see below), whose sum is σ = 1358529399360. Its totient is φ = 301895415360.

The previous prime is 663451122553. The next prime is 663451122589. The reversal of 663451122568 is 865221154366.

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 7 ways as a sum of consecutive naturals, for example, 44917530 + ... + 44932297.

It is an arithmetic number, because the mean of its divisors is an integer number (42454043730).

Almost surely, 2^663451122568 is an apocalyptic number.

It is an amenable number.

663451122568 is an abundant number, since it is smaller than the sum of its proper divisors (695078276792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663451122568 is a wasteful number, since it uses less digits than its factorization.

663451122568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89849917 (or 89849913 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 49.

The spelling of 663451122568 in words is "six hundred sixty-three billion, four hundred fifty-one million, one hundred twenty-two thousand, five hundred sixty-eight".