66660570271 has 2 divisors, whose sum is σ = 66660570272. Its totient is φ = 66660570270.

The previous prime is 66660570269. The next prime is 66660570299. The reversal of 66660570271 is 17207506666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66660570271 - 2¹ = 66660570269 is a prime.

Together with 66660570269, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66660570371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33330285135 + 33330285136.

It is an arithmetic number, because the mean of its divisors is an integer number (33330285136).

Almost surely, 2^66660570271 is an apocalyptic number.

66660570271 is a deficient number, since it is larger than the sum of its proper divisors (1).

66660570271 is an equidigital number, since it uses as much as digits as its factorization.

66660570271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 46.

The spelling of 66660570271 in words is "sixty-six billion, six hundred sixty million, five hundred seventy thousand, two hundred seventy-one".