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27666617345 = 5194127725643
BaseRepresentation
bin11001110001000011…
…110001010000000001
32122102010121210010022
4121301003301100001
5423130123223340
620413155343225
71666414236653
oct316103612001
978363553108
1027666617345
11108080a2114
1254415b1b15
1327bbb323c3
1414a65aa6d3
15abdd613b5
hex6710f1401

27666617345 has 32 divisors (see below), whose sum is σ = 35930321280. Its totient is φ = 20382312960.

The previous prime is 27666617339. The next prime is 27666617449. The reversal of 27666617345 is 54371666672.

It is not a de Polignac number, because 27666617345 - 210 = 27666616321 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1066094 + ... + 1091736.

It is an arithmetic number, because the mean of its divisors is an integer number (1122822540).

Almost surely, 227666617345 is an apocalyptic number.

It is an amenable number.

27666617345 is a deficient number, since it is larger than the sum of its proper divisors (8263703935).

27666617345 is a wasteful number, since it uses less digits than its factorization.

27666617345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25985.

The product of its digits is 7620480, while the sum is 53.

The spelling of 27666617345 in words is "twenty-seven billion, six hundred sixty-six million, six hundred seventeen thousand, three hundred forty-five".

Divisors: 1 5 19 41 95 205 277 779 1385 3895 5263 11357 25643 26315 56785 128215 215783 487217 1051363 1078915 2436085 5256815 7103111 19975897 35515555 99879485 134959109 291227551 674795545 1456137755 5533323469 27666617345