71066117 has 2 divisors, whose sum is σ = 71066118. Its totient is φ = 71066116.

The previous prime is 71066087. The next prime is 71066119. The reversal of 71066117 is 71166017.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68989636 + 2076481 = 8306^2 + 1441^2 .

It is a cyclic number.

It is not a de Polignac number, because 71066117 - 2⁸ = 71065861 is a prime.

Together with 71066119, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71066117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71066119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35533058 + 35533059.

It is an arithmetic number, because the mean of its divisors is an integer number (35533059).

Almost surely, 2^71066117 is an apocalyptic number.

It is an amenable number.

71066117 is a deficient number, since it is larger than the sum of its proper divisors (1).

71066117 is an equidigital number, since it uses as much as digits as its factorization.

71066117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 29.

The square root of 71066117 is about 8430.0721823719. The cubic root of 71066117 is about 414.2102695469.

The spelling of 71066117 in words is "seventy-one million, sixty-six thousand, one hundred seventeen".