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66143 = 711859
BaseRepresentation
bin10000001001011111
310100201202
4100021133
54104033
61230115
7363560
oct201137
9110652
1066143
1145770
123233b
132414c
141a167
15148e8
hex1025f

66143 has 8 divisors (see below), whose sum is σ = 82560. Its totient is φ = 51480.

The previous prime is 66137. The next prime is 66161. The reversal of 66143 is 34166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66143 - 210 = 65119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 66143.

It is not an unprimeable number, because it can be changed into a prime (66103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353 + ... + 506.

It is an arithmetic number, because the mean of its divisors is an integer number (10320).

266143 is an apocalyptic number.

66143 is a deficient number, since it is larger than the sum of its proper divisors (16417).

66143 is a wasteful number, since it uses less digits than its factorization.

66143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877.

The product of its digits is 432, while the sum is 20.

The square root of 66143 is about 257.1828143559. The cubic root of 66143 is about 40.4415658857.

The spelling of 66143 in words is "sixty-six thousand, one hundred forty-three".

Divisors: 1 7 11 77 859 6013 9449 66143