663785792816 has 20 divisors (see below), whose sum is σ = 1287236382432. Its totient is φ = 331595758656.

The previous prime is 663785792807. The next prime is 663785792833. The reversal of 663785792816 is 618297587366.

It is a super-2 number, since 2×663785792816² (a number of 24 digits) contains 22 as substring.

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, 18552680 + ... + 18588423.

Almost surely, 2^663785792816 is an apocalyptic number.

It is an amenable number.

663785792816 is a deficient number, since it is larger than the sum of its proper divisors (623450589616).

663785792816 is a wasteful number, since it uses less digits than its factorization.

663785792816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37142228 (or 37142222 counting only the distinct ones).

The product of its digits is 182891520, while the sum is 68.

The spelling of 663785792816 in words is "six hundred sixty-three billion, seven hundred eighty-five million, seven hundred ninety-two thousand, eight hundred sixteen".