166651412903 has 2 divisors, whose sum is σ = 166651412904. Its totient is φ = 166651412902.

The previous prime is 166651412897. The next prime is 166651412909. The reversal of 166651412903 is 309214156661.

166651412903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (166651412897) and next prime (166651412909).

It is a cyclic number.

It is not a de Polignac number, because 166651412903 - 2¹⁶ = 166651347367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166651412909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83325706451 + 83325706452.

It is an arithmetic number, because the mean of its divisors is an integer number (83325706452).

Almost surely, 2^166651412903 is an apocalyptic number.

166651412903 is a deficient number, since it is larger than the sum of its proper divisors (1).

166651412903 is an equidigital number, since it uses as much as digits as its factorization.

166651412903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 166651412903 in words is "one hundred sixty-six billion, six hundred fifty-one million, four hundred twelve thousand, nine hundred three".