71966 has 4 divisors (see below), whose sum is σ = 107952. Its totient is φ = 35982.
The previous prime is 71963. The next prime is 71971. The reversal of 71966 is 66917.
It is a happy number.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66917 = 61 ⋅1097.
It is a plaindrome in base 13.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (71963) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17990 + ... + 17993.
It is an arithmetic number, because the mean of its divisors is an integer number (26988).
271966 is an apocalyptic number.
71966 is a deficient number, since it is larger than the sum of its proper divisors (35986).
71966 is a wasteful number, since it uses less digits than its factorization.
71966 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 35985.
The product of its digits is 2268, while the sum is 29.
The square root of 71966 is about 268.2647945594. The cubic root of 71966 is about 41.5951270180.
It can be divided in two parts, 71 and 966, that multiplied together give a palindrome (68586).
The spelling of 71966 in words is "seventy-one thousand, nine hundred sixty-six".
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