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660136420513657 is a prime number
BaseRepresentation
bin1001011000011000111111110…
…0110110010001011101111001
310012120100102111011112211021101
42112012033330312101131321
51143011133342122414112
610255554252432011401
7256022165615521633
oct22606177466213571
93176312434484241
10660136420513657
1118138131372810a
1262056a3b690b61
132244679c4a0139
14b902ab7a63a53
15514b9e35d3757
hex25863fcd91779

660136420513657 has 2 divisors, whose sum is σ = 660136420513658. Its totient is φ = 660136420513656.

The previous prime is 660136420513631. The next prime is 660136420513673. The reversal of 660136420513657 is 756315024631066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 651742299211536 + 8394121302121 = 25529244^2 + 2897261^2 .

It is a cyclic number.

It is not a de Polignac number, because 660136420513657 - 223 = 660136412125049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 660136420513598 and 660136420513607.

It is not a weakly prime, because it can be changed into another prime (660136420513357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330068210256828 + 330068210256829.

It is an arithmetic number, because the mean of its divisors is an integer number (330068210256829).

Almost surely, 2660136420513657 is an apocalyptic number.

It is an amenable number.

660136420513657 is a deficient number, since it is larger than the sum of its proper divisors (1).

660136420513657 is an equidigital number, since it uses as much as digits as its factorization.

660136420513657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16329600, while the sum is 55.

The spelling of 660136420513657 in words is "six hundred sixty trillion, one hundred thirty-six billion, four hundred twenty million, five hundred thirteen thousand, six hundred fifty-seven".