71066993 has 2 divisors, whose sum is σ = 71066994. Its totient is φ = 71066992.

The previous prime is 71066959. The next prime is 71066999. The reversal of 71066993 is 39966017.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49463089 + 21603904 = 7033^2 + 4648^2 .

It is a cyclic number.

It is not a de Polignac number, because 71066993 - 2¹⁶ = 71001457 is a prime.

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 71066993.

It is not a weakly prime, because it can be changed into another prime (71066999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35533496 + 35533497.

It is an arithmetic number, because the mean of its divisors is an integer number (35533497).

Almost surely, 2^71066993 is an apocalyptic number.

It is an amenable number.

71066993 is a deficient number, since it is larger than the sum of its proper divisors (1).

71066993 is an equidigital number, since it uses as much as digits as its factorization.

71066993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 71066993 is about 8430.1241390622. The cubic root of 71066993 is about 414.2119714677.

The spelling of 71066993 in words is "seventy-one million, sixty-six thousand, nine hundred ninety-three".