66040031043071 has 2 divisors, whose sum is σ = 66040031043072. Its totient is φ = 66040031043070.

The previous prime is 66040031043053. The next prime is 66040031043193. The reversal of 66040031043071 is 17034013004066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66040031043071 - 2³⁴ = 66022851173887 is a prime.

It is a super-2 number, since 2×66040031043071² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66040031033071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33020015521535 + 33020015521536.

It is an arithmetic number, because the mean of its divisors is an integer number (33020015521536).

Almost surely, 2^{66040031043071} is an apocalyptic number.

66040031043071 is a deficient number, since it is larger than the sum of its proper divisors (1).

66040031043071 is an equidigital number, since it uses as much as digits as its factorization.

66040031043071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 35.

The spelling of 66040031043071 in words is "sixty-six trillion, forty billion, thirty-one million, forty-three thousand, seventy-one".