66655471047 has 16 divisors (see below), whose sum is σ = 97842898560. Its totient is φ = 40026636000.

The previous prime is 66655471033. The next prime is 66655471049. The reversal of 66655471047 is 74017455666.

It is not a de Polignac number, because 66655471047 - 2⁶ = 66655470983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66655471049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9261829 + ... + 9269022.

It is an arithmetic number, because the mean of its divisors is an integer number (6115181160).

Almost surely, 2^66655471047 is an apocalyptic number.

66655471047 is a deficient number, since it is larger than the sum of its proper divisors (31187427513).

66655471047 is a wasteful number, since it uses less digits than its factorization.

66655471047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18530974.

The product of its (nonzero) digits is 4233600, while the sum is 51.

The spelling of 66655471047 in words is "sixty-six billion, six hundred fifty-five million, four hundred seventy-one thousand, forty-seven".