663657551384 has 16 divisors (see below), whose sum is σ = 1244543706720. Its totient is φ = 331779229600.

The previous prime is 663657551377. The next prime is 663657551387. The reversal of 663657551384 is 483155756366.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663657551387) 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, 6136304 + ... + 6243519.

It is an arithmetic number, because the mean of its divisors is an integer number (77783981670).

Almost surely, 2^663657551384 is an apocalyptic number.

It is an amenable number.

663657551384 is a deficient number, since it is larger than the sum of its proper divisors (580886155336).

663657551384 is a wasteful number, since it uses less digits than its factorization.

663657551384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12386530 (or 12386526 counting only the distinct ones).

The product of its digits is 54432000, while the sum is 59.

The spelling of 663657551384 in words is "six hundred sixty-three billion, six hundred fifty-seven million, five hundred fifty-one thousand, three hundred eighty-four".