1866942505367 has 2 divisors, whose sum is σ = 1866942505368. Its totient is φ = 1866942505366.

The previous prime is 1866942505343. The next prime is 1866942505369. The reversal of 1866942505367 is 7635052496681.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1866942505367 - 2¹² = 1866942501271 is a prime.

Together with 1866942505369, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1866942505369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 933471252683 + 933471252684.

It is an arithmetic number, because the mean of its divisors is an integer number (933471252684).

It is a 1-persistent number, because it is pandigital, but 2⋅1866942505367 = 3733885010734 is not.

Almost surely, 2^{1866942505367} is an apocalyptic number.

1866942505367 is a deficient number, since it is larger than the sum of its proper divisors (1).

1866942505367 is an equidigital number, since it uses as much as digits as its factorization.

1866942505367 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65318400, while the sum is 62.

The spelling of 1866942505367 in words is "one trillion, eight hundred sixty-six billion, nine hundred forty-two million, five hundred five thousand, three hundred sixty-seven".