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660136420513664 = 275157315785263
BaseRepresentation
bin1001011000011000111111110…
…0110110010001011110000000
310012120100102111011112211021122
42112012033330312101132000
51143011133342122414124
610255554252432011412
7256022165615521643
oct22606177466213600
93176312434484248
10660136420513664
11181381313728116
1262056a3b690b68
132244679c4a0143
14b902ab7a63a5a
15514b9e35d375e
hex25863fcd91780

660136420513664 has 16 divisors (see below), whose sum is σ = 1315115525242320. Its totient is φ = 330068210256768.

The previous prime is 660136420513657. The next prime is 660136420513673. The reversal of 660136420513664 is 466315024631066.

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×6601364205136642 (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2578657892504 + ... + 2578657892759.

It is an arithmetic number, because the mean of its divisors is an integer number (82194720327645).

Almost surely, 2660136420513664 is an apocalyptic number.

660136420513664 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

660136420513664 is a deficient number, since it is larger than the sum of its proper divisors (654979104728656).

660136420513664 is an equidigital number, since it uses as much as digits as its factorization.

660136420513664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5157315785277 (or 5157315785265 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 53.

The spelling of 660136420513664 in words is "six hundred sixty trillion, one hundred thirty-six billion, four hundred twenty million, five hundred thirteen thousand, six hundred sixty-four".

Divisors: 1 2 4 8 16 32 64 128 5157315785263 10314631570526 20629263141052 41258526282104 82517052564208 165034105128416 330068210256832 660136420513664