66843020727 has 18 divisors (see below), whose sum is σ = 110347421912. Its totient is φ = 38194839216.

The previous prime is 66843020719. The next prime is 66843020731. The reversal of 66843020727 is 72702034866.

66843020727 is a `hidden beast` number, since 6 + 6 + 8 + 430 + 207 + 2 + 7 = 666.

It is not a de Polignac number, because 66843020727 - 2³ = 66843020719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66843020707) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2035813 + ... + 2068385.

Almost surely, 2^66843020727 is an apocalyptic number.

66843020727 is a deficient number, since it is larger than the sum of its proper divisors (43504401185).

66843020727 is an frugal number, since it uses more digits than its factorization.

66843020727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65159 (or 32583 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The spelling of 66843020727 in words is "sixty-six billion, eight hundred forty-three million, twenty thousand, seven hundred twenty-seven".