166870867 has 2 divisors, whose sum is σ = 166870868. Its totient is φ = 166870866.

The previous prime is 166870859. The next prime is 166870877. The reversal of 166870867 is 768078661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166870867 - 2³ = 166870859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166870867.

It is not a weakly prime, because it can be changed into another prime (166870877) 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, 83435433 + 83435434.

It is an arithmetic number, because the mean of its divisors is an integer number (83435434).

Almost surely, 2^166870867 is an apocalyptic number.

166870867 is a deficient number, since it is larger than the sum of its proper divisors (1).

166870867 is an equidigital number, since it uses as much as digits as its factorization.

166870867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 166870867 is about 12917.8507113219. The cubic root of 166870867 is about 550.5458679711.

The spelling of 166870867 in words is "one hundred sixty-six million, eight hundred seventy thousand, eight hundred sixty-seven".