663939044038 has 8 divisors (see below), whose sum is σ = 995922228600. Its totient is φ = 331964967840.

The previous prime is 663939044023. The next prime is 663939044039. The reversal of 663939044038 is 830440939366.

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

It is a self number, because there is not a number n which added to its sum of digits gives 663939044038.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663939044039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2091843 + ... + 2388238.

It is an arithmetic number, because the mean of its divisors is an integer number (124490278575).

Almost surely, 2^663939044038 is an apocalyptic number.

663939044038 is a deficient number, since it is larger than the sum of its proper divisors (331983184562).

663939044038 is a wasteful number, since it uses less digits than its factorization.

663939044038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4554182.

The product of its (nonzero) digits is 10077696, while the sum is 55.

The spelling of 663939044038 in words is "six hundred sixty-three billion, nine hundred thirty-nine million, forty-four thousand, thirty-eight".