166206314537 has 2 divisors, whose sum is σ = 166206314538. Its totient is φ = 166206314536.

The previous prime is 166206314507. The next prime is 166206314543. The reversal of 166206314537 is 735413602661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159248085481 + 6958229056 = 399059^2 + 83416^2 .

It is an emirp because it is prime and its reverse (735413602661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166206314537 - 2⁶ = 166206314473 is a prime.

It is not a weakly prime, because it can be changed into another prime (166206314507) 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, 83103157268 + 83103157269.

It is an arithmetic number, because the mean of its divisors is an integer number (83103157269).

Almost surely, 2^166206314537 is an apocalyptic number.

It is an amenable number.

166206314537 is a deficient number, since it is larger than the sum of its proper divisors (1).

166206314537 is an equidigital number, since it uses as much as digits as its factorization.

166206314537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 44.

The spelling of 166206314537 in words is "one hundred sixty-six billion, two hundred six million, three hundred fourteen thousand, five hundred thirty-seven".