66500231732 has 18 divisors (see below), whose sum is σ = 127916768994. Its totient is φ = 30227377840.

The previous prime is 66500231587. The next prime is 66500231737. The reversal of 66500231732 is 23713200566.

It can be written as a sum of positive squares in only one way, i.e., 38492870416 + 28007361316 = 196196^2 + 167354^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66500231692 and 66500231701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66500231737) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 68698103 + ... + 68699070.

Almost surely, 2^66500231732 is an apocalyptic number.

It is an amenable number.

66500231732 is a deficient number, since it is larger than the sum of its proper divisors (61416537262).

66500231732 is a wasteful number, since it uses less digits than its factorization.

66500231732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137397199 (or 137397186 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 35.

The spelling of 66500231732 in words is "sixty-six billion, five hundred million, two hundred thirty-one thousand, seven hundred thirty-two".