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66688627 is a prime number
BaseRepresentation
bin1111111001100…
…1011001110011
311122111010121011
43332121121303
5114033014002
610341211351
71436562325
oct376313163
9148433534
1066688627
113470a175
121a400b57
1310a7c535
148bdd615
155cc48d7
hex3f99673

66688627 has 2 divisors, whose sum is σ = 66688628. Its totient is φ = 66688626.

The previous prime is 66688621. The next prime is 66688631. The reversal of 66688627 is 72688666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66688627 - 23 = 66688619 is a prime.

It is a super-2 number, since 2×666886272 = 8894745942290258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66688621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33344313 + 33344314.

It is an arithmetic number, because the mean of its divisors is an integer number (33344314).

Almost surely, 266688627 is an apocalyptic number.

66688627 is a deficient number, since it is larger than the sum of its proper divisors (1).

66688627 is an equidigital number, since it uses as much as digits as its factorization.

66688627 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 49.

The square root of 66688627 is about 8166.3104888315. The cubic root of 66688627 is about 405.5246505449.

The spelling of 66688627 in words is "sixty-six million, six hundred eighty-eight thousand, six hundred twenty-seven".