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1668686703713 = 6127355519733
BaseRepresentation
bin11000010010000101011…
…110100110110001100001
312220112011122102120000122
4120102011132212301201
5204314432244004323
63314330055130025
7231362416644401
oct30220536466141
95815148376018
101668686703713
11593760161627
1222b49b973915
13c148325b6a3
145aa9cb20801
152d616779ec8
hex184857a6c61

1668686703713 has 4 divisors (see below), whose sum is σ = 1696042223508. Its totient is φ = 1641331183920.

The previous prime is 1668686703707. The next prime is 1668686703743. The reversal of 1668686703713 is 3173076868661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 208243457569 + 1460443246144 = 456337^2 + 1208488^2 .

It is a cyclic number.

It is not a de Polignac number, because 1668686703713 - 232 = 1664391736417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668686703743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13677759806 + ... + 13677759927.

It is an arithmetic number, because the mean of its divisors is an integer number (424010555877).

Almost surely, 21668686703713 is an apocalyptic number.

It is an amenable number.

1668686703713 is a deficient number, since it is larger than the sum of its proper divisors (27355519795).

1668686703713 is an equidigital number, since it uses as much as digits as its factorization.

1668686703713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27355519794.

The product of its (nonzero) digits is 36578304, while the sum is 62.

The spelling of 1668686703713 in words is "one trillion, six hundred sixty-eight billion, six hundred eighty-six million, seven hundred three thousand, seven hundred thirteen".

Divisors: 1 61 27355519733 1668686703713