71066613 has 16 divisors (see below), whose sum is σ = 100604160. Its totient is φ = 44468736.

The previous prime is 71066609. The next prime is 71066623. The reversal of 71066613 is 31666017.

It is not a de Polignac number, because 71066613 - 2² = 71066609 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71066623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19156 + ... + 22562.

It is an arithmetic number, because the mean of its divisors is an integer number (6287760).

Almost surely, 2^71066613 is an apocalyptic number.

It is an amenable number.

71066613 is a deficient number, since it is larger than the sum of its proper divisors (29537547).

71066613 is a wasteful number, since it uses less digits than its factorization.

71066613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3836.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 71066613 is about 8430.1016008112. The cubic root of 71066613 is about 414.2112331933.

The spelling of 71066613 in words is "seventy-one million, sixty-six thousand, six hundred thirteen".