66673789831 has 16 divisors (see below), whose sum is σ = 74302156800. Its totient is φ = 59307288480.

The previous prime is 66673789801. The next prime is 66673789837. The reversal of 66673789831 is 13898737666.

It is not a de Polignac number, because 66673789831 - 2¹¹ = 66673787783 is a prime.

It is a super-2 number, since 2×66673789831² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66673789837) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2237770 + ... + 2267368.

It is an arithmetic number, because the mean of its divisors is an integer number (4643884800).

Almost surely, 2^66673789831 is an apocalyptic number.

66673789831 is a deficient number, since it is larger than the sum of its proper divisors (7628366969).

66673789831 is a wasteful number, since it uses less digits than its factorization.

66673789831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34014.

The product of its digits is 54867456, while the sum is 64.

The spelling of 66673789831 in words is "sixty-six billion, six hundred seventy-three million, seven hundred eighty-nine thousand, eight hundred thirty-one".