86666563 has 2 divisors, whose sum is σ = 86666564. Its totient is φ = 86666562.

The previous prime is 86666519. The next prime is 86666603. The reversal of 86666563 is 36566668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86666563 - 2¹³ = 86658371 is a prime.

It is a super-2 number, since 2×86666563² = 15022186284465938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86666263) 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, 43333281 + 43333282.

It is an arithmetic number, because the mean of its divisors is an integer number (43333282).

Almost surely, 2^86666563 is an apocalyptic number.

86666563 is a deficient number, since it is larger than the sum of its proper divisors (1).

86666563 is an equidigital number, since it uses as much as digits as its factorization.

86666563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 46.

The square root of 86666563 is about 9309.4877947178. The cubic root of 86666563 is about 442.5379549726.

The spelling of 86666563 in words is "eighty-six million, six hundred sixty-six thousand, five hundred sixty-three".