663626360434 has 8 divisors (see below), whose sum is σ = 996918650460. Its totient is φ = 331320143616.

The previous prime is 663626360407. The next prime is 663626360447. The reversal of 663626360434 is 434063626366.

It can be written as a sum of positive squares in 2 ways, for example, as 637674117025 + 25952243409 = 798545^2 + 161097^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 246516619 + ... + 246519310.

Almost surely, 2^663626360434 is an apocalyptic number.

663626360434 is a deficient number, since it is larger than the sum of its proper divisors (333292290026).

663626360434 is a wasteful number, since it uses less digits than its factorization.

663626360434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493036604.

The product of its (nonzero) digits is 6718464, while the sum is 49.

The spelling of 663626360434 in words is "six hundred sixty-three billion, six hundred twenty-six million, three hundred sixty thousand, four hundred thirty-four".