66707044571 has 2 divisors, whose sum is σ = 66707044572. Its totient is φ = 66707044570.

The previous prime is 66707044559. The next prime is 66707044597. The reversal of 66707044571 is 17544070766.

66707044571 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66707044571 - 2¹⁴ = 66707028187 is a prime.

It is not a weakly prime, because it can be changed into another prime (66707044541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33353522285 + 33353522286.

It is an arithmetic number, because the mean of its divisors is an integer number (33353522286).

Almost surely, 2^66707044571 is an apocalyptic number.

66707044571 is a deficient number, since it is larger than the sum of its proper divisors (1).

66707044571 is an equidigital number, since it uses as much as digits as its factorization.

66707044571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 987840, while the sum is 47.

The spelling of 66707044571 in words is "sixty-six billion, seven hundred seven million, forty-four thousand, five hundred seventy-one".