663566317044 has 48 divisors (see below), whose sum is σ = 1562455661760. Its totient is φ = 219175706880.

The previous prime is 663566317033. The next prime is 663566317061. The reversal of 663566317044 is 440713665366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 487242 + ... + 1250814.

It is an arithmetic number, because the mean of its divisors is an integer number (32551159620).

Almost surely, 2^663566317044 is an apocalyptic number.

It is an amenable number.

663566317044 is an abundant number, since it is smaller than the sum of its proper divisors (898889344716).

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

663566317044 is a wasteful number, since it uses less digits than its factorization.

663566317044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764240 (or 764238 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 51.

The spelling of 663566317044 in words is "six hundred sixty-three billion, five hundred sixty-six million, three hundred seventeen thousand, forty-four".