166683724903187 has 2 divisors, whose sum is σ = 166683724903188. Its totient is φ = 166683724903186.

The previous prime is 166683724903181. The next prime is 166683724903207. The reversal of 166683724903187 is 781309427386661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166683724903187 - 2¹⁴ = 166683724886803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166683724903187.

It is not a weakly prime, because it can be changed into another prime (166683724903181) 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, 83341862451593 + 83341862451594.

It is an arithmetic number, because the mean of its divisors is an integer number (83341862451594).

Almost surely, 2^{166683724903187} is an apocalyptic number.

166683724903187 is a deficient number, since it is larger than the sum of its proper divisors (1).

166683724903187 is an equidigital number, since it uses as much as digits as its factorization.

166683724903187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 438939648, while the sum is 71.

The spelling of 166683724903187 in words is "one hundred sixty-six trillion, six hundred eighty-three billion, seven hundred twenty-four million, nine hundred three thousand, one hundred eighty-seven".