86557666823 has 2 divisors, whose sum is σ = 86557666824. Its totient is φ = 86557666822.

The previous prime is 86557666801. The next prime is 86557666829. The reversal of 86557666823 is 32866675568.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86557666823 - 2²⁴ = 86540889607 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86557666829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43278833411 + 43278833412.

It is an arithmetic number, because the mean of its divisors is an integer number (43278833412).

Almost surely, 2^86557666823 is an apocalyptic number.

86557666823 is a deficient number, since it is larger than the sum of its proper divisors (1).

86557666823 is an equidigital number, since it uses as much as digits as its factorization.

86557666823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87091200, while the sum is 62.

The spelling of 86557666823 in words is "eighty-six billion, five hundred fifty-seven million, six hundred sixty-six thousand, eight hundred twenty-three".