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666120 = 233571361
BaseRepresentation
bin10100010101000001000
31020211202010
42202220020
5132303440
622135520
75443020
oct2425010
91224663
10666120
11415514
122815a0
131a4270
14134a80
15d2580
hexa2a08

666120 has 128 divisors (see below), whose sum is σ = 2499840. Its totient is φ = 138240.

The previous prime is 666119. The next prime is 666139. The reversal of 666120 is 21666.

666120 is nontrivially palindromic in base 11.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 666120.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10890 + ... + 10950.

It is an arithmetic number, because the mean of its divisors is an integer number (19530).

2666120 is an apocalyptic number.

666120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1249920).

666120 is an abundant number, since it is smaller than the sum of its proper divisors (1833720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666120 is a wasteful number, since it uses less digits than its factorization.

666120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 666120 is about 816.1617486749. The cubic root of 666120 is about 87.3341620780.

Adding to 666120 its reverse (21666), we get a palindrome (687786).

The spelling of 666120 in words is "six hundred sixty-six thousand, one hundred twenty".

Divisors: 1 2 3 4 5 6 7 8 10 12 13 14 15 20 21 24 26 28 30 35 39 40 42 52 56 60 61 65 70 78 84 91 104 105 120 122 130 140 156 168 182 183 195 210 244 260 273 280 305 312 364 366 390 420 427 455 488 520 546 610 728 732 780 793 840 854 910 915 1092 1220 1281 1365 1464 1560 1586 1708 1820 1830 2135 2184 2379 2440 2562 2730 3172 3416 3640 3660 3965 4270 4758 5124 5460 5551 6344 6405 7320 7930 8540 9516 10248 10920 11102 11895 12810 15860 16653 17080 19032 22204 23790 25620 27755 31720 33306 44408 47580 51240 55510 66612 83265 95160 111020 133224 166530 222040 333060 666120