71866141843173 has 4 divisors (see below), whose sum is σ = 95821522457568. Its totient is φ = 47910761228780.

The previous prime is 71866141843163. The next prime is 71866141843217. The reversal of 71866141843173 is 37134814166817.

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.

It is a cyclic number.

It is not a de Polignac number, because 71866141843173 - 2⁹ = 71866141842661 is a prime.

It is a super-2 number, since 2×71866141843173² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71866141843103) 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, 11977690307193 + ... + 11977690307198.

It is an arithmetic number, because the mean of its divisors is an integer number (23955380614392).

Almost surely, 2^{71866141843173} is an apocalyptic number.

It is an amenable number.

71866141843173 is a deficient number, since it is larger than the sum of its proper divisors (23955380614395).

71866141843173 is a wasteful number, since it uses less digits than its factorization.

71866141843173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23955380614394.

The product of its digits is 16257024, while the sum is 60.

The spelling of 71866141843173 in words is "seventy-one trillion, eight hundred sixty-six billion, one hundred forty-one million, eight hundred forty-three thousand, one hundred seventy-three".