66550471443 has 6 divisors (see below), whose sum is σ = 96128458764. Its totient is φ = 44366980956.

The previous prime is 66550471423. The next prime is 66550471451. The reversal of 66550471443 is 34417405566.

66550471443 is a `hidden beast` number, since 6 + 6 + 550 + 47 + 14 + 43 = 666.

It is not a de Polignac number, because 66550471443 - 2¹⁰ = 66550470419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66550471423) 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, 3697248405 + ... + 3697248422.

It is an arithmetic number, because the mean of its divisors is an integer number (16021409794).

Almost surely, 2^66550471443 is an apocalyptic number.

66550471443 is a deficient number, since it is larger than the sum of its proper divisors (29577987321).

66550471443 is a wasteful number, since it uses less digits than its factorization.

66550471443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7394496833 (or 7394496830 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 45.

The spelling of 66550471443 in words is "sixty-six billion, five hundred fifty million, four hundred seventy-one thousand, four hundred forty-three".