166863125783 has 2 divisors, whose sum is σ = 166863125784. Its totient is φ = 166863125782.

The previous prime is 166863125761. The next prime is 166863125833. The reversal of 166863125783 is 387521368661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166863125783 - 2⁶ = 166863125719 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166863125713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83431562891 + 83431562892.

It is an arithmetic number, because the mean of its divisors is an integer number (83431562892).

Almost surely, 2^166863125783 is an apocalyptic number.

166863125783 is a deficient number, since it is larger than the sum of its proper divisors (1).

166863125783 is an equidigital number, since it uses as much as digits as its factorization.

166863125783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8709120, while the sum is 56.

The spelling of 166863125783 in words is "one hundred sixty-six billion, eight hundred sixty-three million, one hundred twenty-five thousand, seven hundred eighty-three".