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BaseRepresentation
bin111101111111101011…
…001111101100100001
320100211010201020010221
4331333223033230201
52042312014133403
650325200123041
74544403234130
oct757753175441
9210733636127
1066566552353
112625a0a1034
1210a99006481
13637b010522
143316a1d917
151ae8e9cdbd
hexf7facfb21

66566552353 has 8 divisors (see below), whose sum is σ = 78699372480. Its totient is φ = 55089560400.

The previous prime is 66566552341. The next prime is 66566552387. The reversal of 66566552353 is 35325566566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66566552353 - 29 = 66566551841 is a prime.

It is a super-2 number, since 2×665665523532 (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66566552353.

It is not an unprimeable number, because it can be changed into a prime (66566552323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163956823 + ... + 163957228.

It is an arithmetic number, because the mean of its divisors is an integer number (9837421560).

Almost surely, 266566552353 is an apocalyptic number.

It is an amenable number.

66566552353 is a deficient number, since it is larger than the sum of its proper divisors (12132820127).

66566552353 is a wasteful number, since it uses less digits than its factorization.

66566552353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327914087.

The product of its digits is 14580000, while the sum is 52.

The spelling of 66566552353 in words is "sixty-six billion, five hundred sixty-six million, five hundred fifty-two thousand, three hundred fifty-three".