66287129 has 2 divisors, whose sum is σ = 66287130. Its totient is φ = 66287128.

The previous prime is 66287113. The next prime is 66287141. The reversal of 66287129 is 92178266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53875600 + 12411529 = 7340^2 + 3523^2 .

It is a cyclic number.

It is not a de Polignac number, because 66287129 - 2⁴ = 66287113 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66287189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33143564 + 33143565.

It is an arithmetic number, because the mean of its divisors is an integer number (33143565).

Almost surely, 2^66287129 is an apocalyptic number.

It is an amenable number.

66287129 is a deficient number, since it is larger than the sum of its proper divisors (1).

66287129 is an equidigital number, since it uses as much as digits as its factorization.

66287129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 66287129 is about 8141.6907949148. The cubic root of 66287129 is about 404.7091932608.

The spelling of 66287129 in words is "sixty-six million, two hundred eighty-seven thousand, one hundred twenty-nine".