1662843727837 has 2 divisors, whose sum is σ = 1662843727838. Its totient is φ = 1662843727836.

The previous prime is 1662843727789. The next prime is 1662843727871. The reversal of 1662843727837 is 7387273482661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1468910064196 + 193933663641 = 1211986^2 + 440379^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1662843727837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1662843724837) 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, 831421863918 + 831421863919.

It is an arithmetic number, because the mean of its divisors is an integer number (831421863919).

Almost surely, 2^{1662843727837} is an apocalyptic number.

It is an amenable number.

1662843727837 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662843727837 is an equidigital number, since it uses as much as digits as its factorization.

1662843727837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113799168, while the sum is 64.

The spelling of 1662843727837 in words is "one trillion, six hundred sixty-two billion, eight hundred forty-three million, seven hundred twenty-seven thousand, eight hundred thirty-seven".