66771781831132 has 12 divisors (see below), whose sum is σ = 133543563662320. Its totient is φ = 28616477927616.

The previous prime is 66771781831093. The next prime is 66771781831199. The reversal of 66771781831132 is 23113818717766.

66771781831132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

66771781831132 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1192353246957 + ... + 1192353247012.

Almost surely, 2^{66771781831132} is an apocalyptic number.

It is an amenable number.

66771781831132 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66771781831132 is a wasteful number, since it uses less digits than its factorization.

66771781831132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2384706493980 (or 2384706493978 counting only the distinct ones).

The product of its digits is 14224896, while the sum is 61.

The spelling of 66771781831132 in words is "sixty-six trillion, seven hundred seventy-one billion, seven hundred eighty-one million, eight hundred thirty-one thousand, one hundred thirty-two".