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BaseRepresentation
bin111110010110110001…
…100100101101110111
320101211010221001010122
4332112301210231313
52044110221243122
650431442242155
74560120231443
oct762661445567
9211733831118
1066954087287
112643892283a
1210b8695635b
1364103a9239
14335229b823
151b1ceed142
hexf96c64b77

66954087287 has 2 divisors, whose sum is σ = 66954087288. Its totient is φ = 66954087286.

The previous prime is 66954087253. The next prime is 66954087307. The reversal of 66954087287 is 78278045966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66954087287 - 212 = 66954083191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66954087247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33477043643 + 33477043644.

It is an arithmetic number, because the mean of its divisors is an integer number (33477043644).

Almost surely, 266954087287 is an apocalyptic number.

66954087287 is a deficient number, since it is larger than the sum of its proper divisors (1).

66954087287 is an equidigital number, since it uses as much as digits as its factorization.

66954087287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40642560, while the sum is 62.

The spelling of 66954087287 in words is "sixty-six billion, nine hundred fifty-four million, eighty-seven thousand, two hundred eighty-seven".