71066917 has 4 divisors (see below), whose sum is σ = 72719680. Its totient is φ = 69414156.

The previous prime is 71066909. The next prime is 71066959. The reversal of 71066917 is 71966017.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71966017 = 59 ⋅1219763.

It is a cyclic number.

It is not a de Polignac number, because 71066917 - 2³ = 71066909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71066117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 826317 + ... + 826402.

It is an arithmetic number, because the mean of its divisors is an integer number (18179920).

Almost surely, 2^71066917 is an apocalyptic number.

It is an amenable number.

71066917 is a deficient number, since it is larger than the sum of its proper divisors (1652763).

71066917 is a wasteful number, since it uses less digits than its factorization.

71066917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652762.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 71066917 is about 8430.1196314169. The cubic root of 71066917 is about 414.2118238131.

The spelling of 71066917 in words is "seventy-one million, sixty-six thousand, nine hundred seventeen".