1866712442929 has 2 divisors, whose sum is σ = 1866712442930. Its totient is φ = 1866712442928.

The previous prime is 1866712442897. The next prime is 1866712442953. The reversal of 1866712442929 is 9292442176681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1093980024225 + 772732418704 = 1045935^2 + 879052^2 .

It is an emirp because it is prime and its reverse (9292442176681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1866712442929 - 2⁵ = 1866712442897 is a prime.

It is not a weakly prime, because it can be changed into another prime (1866712442729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 933356221464 + 933356221465.

It is an arithmetic number, because the mean of its divisors is an integer number (933356221465).

Almost surely, 2^{1866712442929} is an apocalyptic number.

It is an amenable number.

1866712442929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1866712442929 is an equidigital number, since it uses as much as digits as its factorization.

1866712442929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20901888, while the sum is 61.

The spelling of 1866712442929 in words is "one trillion, eight hundred sixty-six billion, seven hundred twelve million, four hundred forty-two thousand, nine hundred twenty-nine".