12166486867 has 2 divisors, whose sum is σ = 12166486868. Its totient is φ = 12166486866.

The previous prime is 12166486859. The next prime is 12166486897. The reversal of 12166486867 is 76868466121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12166486867 - 2³ = 12166486859 is a prime.

It is not a weakly prime, because it can be changed into another prime (12166486897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6083243433 + 6083243434.

It is an arithmetic number, because the mean of its divisors is an integer number (6083243434).

Almost surely, 2^12166486867 is an apocalyptic number.

12166486867 is a deficient number, since it is larger than the sum of its proper divisors (1).

12166486867 is an equidigital number, since it uses as much as digits as its factorization.

12166486867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4644864, while the sum is 55.

The spelling of 12166486867 in words is "twelve billion, one hundred sixty-six million, four hundred eighty-six thousand, eight hundred sixty-seven".