1666837037017 has 2 divisors, whose sum is σ = 1666837037018. Its totient is φ = 1666837037016.

The previous prime is 1666837036993. The next prime is 1666837037027. The reversal of 1666837037017 is 7107307386661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1270165064256 + 396671972761 = 1127016^2 + 629819^2 .

It is a cyclic number.

It is not a de Polignac number, because 1666837037017 - 2¹¹ = 1666837034969 is a prime.

It is a super-2 number, since 2×1666837037017² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1666837037027) 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, 833418518508 + 833418518509.

It is an arithmetic number, because the mean of its divisors is an integer number (833418518509).

Almost surely, 2^{1666837037017} is an apocalyptic number.

It is an amenable number.

1666837037017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1666837037017 is an equidigital number, since it uses as much as digits as its factorization.

1666837037017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5334336, while the sum is 55.

The spelling of 1666837037017 in words is "one trillion, six hundred sixty-six billion, eight hundred thirty-seven million, thirty-seven thousand, seventeen".