71166189 has 4 divisors (see below), whose sum is σ = 94888256. Its totient is φ = 47444124.

The previous prime is 71166187. The next prime is 71166197. The reversal of 71166189 is 98166117.

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 not a de Polignac number, because 71166189 - 2¹ = 71166187 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 (71166187) 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, 11861029 + ... + 11861034.

It is an arithmetic number, because the mean of its divisors is an integer number (23722064).

Almost surely, 2^71166189 is an apocalyptic number.

It is an amenable number.

71166189 is a deficient number, since it is larger than the sum of its proper divisors (23722067).

71166189 is a wasteful number, since it uses less digits than its factorization.

71166189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23722066.

The product of its digits is 18144, while the sum is 39.

The square root of 71166189 is about 8436.0055120892. The cubic root of 71166189 is about 414.4046022363.

The spelling of 71166189 in words is "seventy-one million, one hundred sixty-six thousand, one hundred eighty-nine".