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10665621851 is a prime number
BaseRepresentation
bin10011110111011100…
…00111100101011011
31000112022020201122112
421323232013211123
5133320344344401
64522201142535
7525206201303
oct117356074533
930468221575
1010665621851
114583513615
122097a8aa4b
13100c880b61
1473270c603
1542653e3bb
hex27bb8795b

10665621851 has 2 divisors, whose sum is σ = 10665621852. Its totient is φ = 10665621850.

The previous prime is 10665621817. The next prime is 10665621853. The reversal of 10665621851 is 15812656601.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10665621851 - 210 = 10665620827 is a prime.

It is a super-2 number, since 2×106656218512 (a number of 21 digits) contains 22 as substring.

Together with 10665621853, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 10665621799 and 10665621808.

It is not a weakly prime, because it can be changed into another prime (10665621853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5332810925 + 5332810926.

It is an arithmetic number, because the mean of its divisors is an integer number (5332810926).

Almost surely, 210665621851 is an apocalyptic number.

10665621851 is a deficient number, since it is larger than the sum of its proper divisors (1).

10665621851 is an equidigital number, since it uses as much as digits as its factorization.

10665621851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 10665621851 in words is "ten billion, six hundred sixty-five million, six hundred twenty-one thousand, eight hundred fifty-one".