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66705 = 354447
BaseRepresentation
bin10000010010010001
310101111120
4100102101
54113310
61232453
7365322
oct202221
9111446
1066705
1146131
1232729
1324492
141a449
1514b70
hex10491

66705 has 8 divisors (see below), whose sum is σ = 106752. Its totient is φ = 35568.

The previous prime is 66701. The next prime is 66713. The reversal of 66705 is 50766.

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

It is not a de Polignac number, because 66705 - 22 = 66701 is a prime.

It is an Ulam number.

66705 is a lucky number.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (66701) 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 7 ways as a sum of consecutive naturals, for example, 2209 + ... + 2238.

It is an arithmetic number, because the mean of its divisors is an integer number (13344).

266705 is an apocalyptic number.

It is an amenable number.

66705 is a deficient number, since it is larger than the sum of its proper divisors (40047).

66705 is a wasteful number, since it uses less digits than its factorization.

66705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4455.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 66705 is about 258.2731112602. The cubic root of 66705 is about 40.5557835173. Note that the first 3 decimals are identical.

The spelling of 66705 in words is "sixty-six thousand, seven hundred five".

Divisors: 1 3 5 15 4447 13341 22235 66705