66842893688 has 16 divisors (see below), whose sum is σ = 125347814280. Its totient is φ = 33416809888.

The previous prime is 66842893591. The next prime is 66842893739. The reversal of 66842893688 is 88639824866.

66842893688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 517970 + ... + 634017.

Almost surely, 2^66842893688 is an apocalyptic number.

It is an amenable number.

66842893688 is a deficient number, since it is larger than the sum of its proper divisors (58504920592).

66842893688 is a wasteful number, since it uses less digits than its factorization.

66842893688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159246 (or 1159242 counting only the distinct ones).

The product of its digits is 191102976, while the sum is 68.

The spelling of 66842893688 in words is "sixty-six billion, eight hundred forty-two million, eight hundred ninety-three thousand, six hundred eighty-eight".