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71660017 = 11133371487
BaseRepresentation
bin1000100010101…
…11000111110001
311222211201001201
410101113013301
5121321110032
611035531201
71530046222
oct421270761
9158751051
1071660017
11374a5260
121bbb9b01
1311b002a0
149735249
1564578e7
hex44571f1

71660017 has 16 divisors (see below), whose sum is σ = 84494592. Its totient is φ = 59915520.

The previous prime is 71659999. The next prime is 71660023. The reversal of 71660017 is 71006617.

It is a cyclic number.

It is not a de Polignac number, because 71660017 - 215 = 71627249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71660047) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 47448 + ... + 48934.

It is an arithmetic number, because the mean of its divisors is an integer number (5280912).

Almost surely, 271660017 is an apocalyptic number.

It is an amenable number.

71660017 is a deficient number, since it is larger than the sum of its proper divisors (12834575).

71660017 is a wasteful number, since it uses less digits than its factorization.

71660017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 71660017 is about 8465.2239781355. The cubic root of 71660017 is about 415.3609227711.

It can be divided in two parts, 716600 and 17, that added together give a palindrome (716617).

The spelling of 71660017 in words is "seventy-one million, six hundred sixty thousand, seventeen".

Divisors: 1 11 13 143 337 1487 3707 4381 16357 19331 48191 212641 501119 5512309 6514547 71660017