86666329 has 2 divisors, whose sum is σ = 86666330. Its totient is φ = 86666328.

The previous prime is 86666303. The next prime is 86666341. The reversal of 86666329 is 92366668.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80138304 + 6528025 = 8952^2 + 2555^2 .

It is a cyclic number.

It is not a de Polignac number, because 86666329 - 2¹⁹ = 86142041 is a prime.

It is a super-2 number, since 2×86666329² = 15022105164672482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86666399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43333164 + 43333165.

It is an arithmetic number, because the mean of its divisors is an integer number (43333165).

Almost surely, 2^86666329 is an apocalyptic number.

It is an amenable number.

86666329 is a deficient number, since it is larger than the sum of its proper divisors (1).

86666329 is an equidigital number, since it uses as much as digits as its factorization.

86666329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 46.

The square root of 86666329 is about 9309.4752268858. The cubic root of 86666329 is about 442.5375566876.

The spelling of 86666329 in words is "eighty-six million, six hundred sixty-six thousand, three hundred twenty-nine".