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65671 = 173863
BaseRepresentation
bin10000000010000111
310100002021
4100002013
54100141
61224011
7362314
oct200207
9110067
1065671
1145381
1232007
1323b78
1419d0b
15146d1
hex10087

65671 has 4 divisors (see below), whose sum is σ = 69552. Its totient is φ = 61792.

The previous prime is 65657. The next prime is 65677. The reversal of 65671 is 17656.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65671 - 27 = 65543 is a prime.

It is a super-4 number, since 4×656714 = 74396843444447272324, which contains 4444 as substring.

It is a Duffinian number.

65671 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1915 + ... + 1948.

It is an arithmetic number, because the mean of its divisors is an integer number (17388).

265671 is an apocalyptic number.

65671 is a deficient number, since it is larger than the sum of its proper divisors (3881).

65671 is a wasteful number, since it uses less digits than its factorization.

65671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3880.

The product of its digits is 1260, while the sum is 25.

The square root of 65671 is about 256.2635362278. The cubic root of 65671 is about 40.3451384215.

It can be divided in two parts, 656 and 71, that added together give a palindrome (727).

The spelling of 65671 in words is "sixty-five thousand, six hundred seventy-one".

Divisors: 1 17 3863 65671