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66608895696 = 2437255177711
BaseRepresentation
bin111110000010001100…
…110001011011010000
320100221002101111021220
4332002030301123100
52042403334130241
650333311445040
74545426162120
oct760214613320
9210832344256
1066608895696
1126280a92232
1210aab226780
136386a17865
14331c4c2c80
151aeca64166
hexf823316d0

66608895696 has 80 divisors (see below), whose sum is σ = 196734455808. Its totient is φ = 19023408000.

The previous prime is 66608895679. The next prime is 66608895697. The reversal of 66608895696 is 69659880666.

It is a self number, because there is not a number n which added to its sum of digits gives 66608895696.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66608895697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 818281 + ... + 895991.

Almost surely, 266608895696 is an apocalyptic number.

It is an amenable number.

66608895696 is an abundant number, since it is smaller than the sum of its proper divisors (130125560112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66608895696 is a wasteful number, since it uses less digits than its factorization.

66608895696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80280 (or 80274 counting only the distinct ones).

The product of its (nonzero) digits is 201553920, while the sum is 69.

The spelling of 66608895696 in words is "sixty-six billion, six hundred eight million, eight hundred ninety-five thousand, six hundred ninety-six".

Divisors: 1 2 3 4 6 7 8 12 14 16 21 24 28 42 48 56 84 112 168 336 2551 5102 7653 10204 15306 17857 20408 30612 35714 40816 53571 61224 71428 77711 107142 122448 142856 155422 214284 233133 285712 310844 428568 466266 543977 621688 857136 932532 1087954 1243376 1631931 1865064 2175908 3263862 3730128 4351816 6527724 8703632 13055448 26110896 198240761 396481522 594722283 792963044 1189444566 1387685327 1585926088 2378889132 2775370654 3171852176 4163055981 4757778264 5550741308 8326111962 9515556528 11101482616 16652223924 22202965232 33304447848 66608895696