166679894041 has 2 divisors, whose sum is σ = 166679894042. Its totient is φ = 166679894040.

The previous prime is 166679894039. The next prime is 166679894053. The reversal of 166679894041 is 140498976661.

166679894041 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120270240000 + 46409654041 = 346800^2 + 215429^2 .

It is a cyclic number.

It is not a de Polignac number, because 166679894041 - 2¹ = 166679894039 is a prime.

Together with 166679894039, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (166679804041) 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, 83339947020 + 83339947021.

It is an arithmetic number, because the mean of its divisors is an integer number (83339947021).

Almost surely, 2^166679894041 is an apocalyptic number.

It is an amenable number.

166679894041 is a deficient number, since it is larger than the sum of its proper divisors (1).

166679894041 is an equidigital number, since it uses as much as digits as its factorization.

166679894041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15676416, while the sum is 61.

The spelling of 166679894041 in words is "one hundred sixty-six billion, six hundred seventy-nine million, eight hundred ninety-four thousand, forty-one".