166590804937 has 2 divisors, whose sum is σ = 166590804938. Its totient is φ = 166590804936.

The previous prime is 166590804931. The next prime is 166590804953. The reversal of 166590804937 is 739408095661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152415283216 + 14175521721 = 390404^2 + 119061^2 .

It is an emirp because it is prime and its reverse (739408095661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166590804937 - 2¹⁵ = 166590772169 is a prime.

It is not a weakly prime, because it can be changed into another prime (166590804931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83295402468 + 83295402469.

It is an arithmetic number, because the mean of its divisors is an integer number (83295402469).

Almost surely, 2^166590804937 is an apocalyptic number.

It is an amenable number.

166590804937 is a deficient number, since it is larger than the sum of its proper divisors (1).

166590804937 is an equidigital number, since it uses as much as digits as its factorization.

166590804937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9797760, while the sum is 58.

The spelling of 166590804937 in words is "one hundred sixty-six billion, five hundred ninety million, eight hundred four thousand, nine hundred thirty-seven".