86218405667 has 2 divisors, whose sum is σ = 86218405668. Its totient is φ = 86218405666.

The previous prime is 86218405579. The next prime is 86218405673. The reversal of 86218405667 is 76650481268.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86218405667 is a prime.

It is a super-2 number, since 2×86218405667² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86218405687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43109202833 + 43109202834.

It is an arithmetic number, because the mean of its divisors is an integer number (43109202834).

Almost surely, 2^86218405667 is an apocalyptic number.

86218405667 is a deficient number, since it is larger than the sum of its proper divisors (1).

86218405667 is an equidigital number, since it uses as much as digits as its factorization.

86218405667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 86218405667 in words is "eighty-six billion, two hundred eighteen million, four hundred five thousand, six hundred sixty-seven".