71667 has 6 divisors (see below), whose sum is σ = 103532. Its totient is φ = 47772.
The previous prime is 71663. The next prime is 71671. The reversal of 71667 is 76617.
It is an interprime number because it is at equal distance from previous prime (71663) and next prime (71671).
It is not a de Polignac number, because 71667 - 22 = 71663 is a prime.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 71667.
It is not an unprimeable number, because it can be changed into a prime (71663) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3973 + ... + 3990.
271667 is an apocalyptic number.
71667 is a deficient number, since it is larger than the sum of its proper divisors (31865).
71667 is a wasteful number, since it uses less digits than its factorization.
71667 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 7969 (or 7966 counting only the distinct ones).
The product of its digits is 1764, while the sum is 27.
The square root of 71667 is about 267.7069293089. The cubic root of 71667 is about 41.5374414121.
Subtracting 71667 from its reverse (76617), we obtain a triangular number (4950 = T99).
The spelling of 71667 in words is "seventy-one thousand, six hundred sixty-seven".
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