66108687412 has 24 divisors (see below), whose sum is σ = 117378934400. Its totient is φ = 32573451456.

The previous prime is 66108687391. The next prime is 66108687413. The reversal of 66108687412 is 21478680166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66108687413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34737 + ... + 365272.

Almost surely, 2^66108687412 is an apocalyptic number.

It is an amenable number.

66108687412 is a deficient number, since it is larger than the sum of its proper divisors (51270246988).

66108687412 is a wasteful number, since it uses less digits than its factorization.

66108687412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400615 (or 400613 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 49.

The spelling of 66108687412 in words is "sixty-six billion, one hundred eight million, six hundred eighty-seven thousand, four hundred twelve".