37666485817 has 2 divisors, whose sum is σ = 37666485818. Its totient is φ = 37666485816.

The previous prime is 37666485797. The next prime is 37666485821. The reversal of 37666485817 is 71858466673.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33098888761 + 4567597056 = 181931^2 + 67584^2 .

It is a cyclic number.

It is not a de Polignac number, because 37666485817 - 2²³ = 37658097209 is a prime.

It is not a weakly prime, because it can be changed into another prime (37666485617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18833242908 + 18833242909.

It is an arithmetic number, because the mean of its divisors is an integer number (18833242909).

Almost surely, 2^37666485817 is an apocalyptic number.

It is an amenable number.

37666485817 is a deficient number, since it is larger than the sum of its proper divisors (1).

37666485817 is an equidigital number, since it uses as much as digits as its factorization.

37666485817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40642560, while the sum is 61.

The spelling of 37666485817 in words is "thirty-seven billion, six hundred sixty-six million, four hundred eighty-five thousand, eight hundred seventeen".