86666423 has 2 divisors, whose sum is σ = 86666424. Its totient is φ = 86666422.

The previous prime is 86666417. The next prime is 86666473. The reversal of 86666423 is 32466668.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86666423 - 2²² = 82472119 is a prime.

It is a super-2 number, since 2×86666423² = 15022137751229858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86666473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43333211 + 43333212.

It is an arithmetic number, because the mean of its divisors is an integer number (43333212).

Almost surely, 2^86666423 is an apocalyptic number.

86666423 is a deficient number, since it is larger than the sum of its proper divisors (1).

86666423 is an equidigital number, since it uses as much as digits as its factorization.

86666423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 41.

The square root of 86666423 is about 9309.4802755041. The cubic root of 86666423 is about 442.5377166825.

The spelling of 86666423 in words is "eighty-six million, six hundred sixty-six thousand, four hundred twenty-three".