66671 has 12 divisors (see below), whose sum is σ = 79800. Its totient is φ = 55440.

The previous prime is 66653. The next prime is 66683. The reversal of 66671 is 17666.

It is not a de Polignac number, because 66671 - 2¹⁰ = 65647 is a prime.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 66671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2285 + ... + 2313.

It is an arithmetic number, because the mean of its divisors is an integer number (6650).

2⁶⁶⁶⁷¹ is an apocalyptic number.

66671 is a deficient number, since it is larger than the sum of its proper divisors (13129).

66671 is a wasteful number, since it uses less digits than its factorization.

66671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 59 counting only the distinct ones).

The product of its digits is 1512, while the sum is 26.

The square root of 66671 is about 258.2072810747. The cubic root of 66671 is about 40.5488918251.

It can be divided in two parts, 666 and 71, that added together give a palindrome (737).

The spelling of 66671 in words is "sixty-six thousand, six hundred seventy-one".