66710418412 has 18 divisors (see below), whose sum is σ = 128321074364. Its totient is φ = 30322917240.

The previous prime is 66710418409. The next prime is 66710418413. The reversal of 66710418412 is 21481401766.

It is not an unprimeable number, because it can be changed into a prime (66710418413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68915238 + ... + 68916205.

Almost surely, 2^66710418412 is an apocalyptic number.

It is an amenable number.

66710418412 is a deficient number, since it is larger than the sum of its proper divisors (61610655952).

66710418412 is a wasteful number, since it uses less digits than its factorization.

66710418412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137831469 (or 137831456 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 66710418412 in words is "sixty-six billion, seven hundred ten million, four hundred eighteen thousand, four hundred twelve".