66506247112 has 16 divisors (see below), whose sum is σ = 124863952860. Its totient is φ = 33209193024.

The previous prime is 66506247109. The next prime is 66506247127. The reversal of 66506247112 is 21174260566.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 66437124516 + 69122596 = 257754^2 + 8314^2 .

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, 5484883 + ... + 5496994.

Almost surely, 2^66506247112 is an apocalyptic number.

It is an amenable number.

66506247112 is a deficient number, since it is larger than the sum of its proper divisors (58357705748).

66506247112 is a wasteful number, since it uses less digits than its factorization.

66506247112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10982640 (or 10982636 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 66506247112 in words is "sixty-six billion, five hundred six million, two hundred forty-seven thousand, one hundred twelve".