66631717144 has 16 divisors (see below), whose sum is σ = 125098652520. Its totient is φ = 33272076480.

The previous prime is 66631717127. The next prime is 66631717169. The reversal of 66631717144 is 44171713666.

It is a junction number, because it is equal to n+sod(n) for n = 66631717094 and 66631717103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5466294 + ... + 5478469.

Almost surely, 2^66631717144 is an apocalyptic number.

It is an amenable number.

66631717144 is a deficient number, since it is larger than the sum of its proper divisors (58466935376).

66631717144 is a wasteful number, since it uses less digits than its factorization.

66631717144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10945530 (or 10945526 counting only the distinct ones).

The product of its digits is 508032, while the sum is 46.

The spelling of 66631717144 in words is "sixty-six billion, six hundred thirty-one million, seven hundred seventeen thousand, one hundred forty-four".