166347438371 has 2 divisors, whose sum is σ = 166347438372. Its totient is φ = 166347438370.

The previous prime is 166347438343. The next prime is 166347438373. The reversal of 166347438371 is 173834743661.

166347438371 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166347438371 is a prime.

Together with 166347438373, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (166347438373) 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, 83173719185 + 83173719186.

It is an arithmetic number, because the mean of its divisors is an integer number (83173719186).

Almost surely, 2^166347438371 is an apocalyptic number.

166347438371 is a deficient number, since it is larger than the sum of its proper divisors (1).

166347438371 is an equidigital number, since it uses as much as digits as its factorization.

166347438371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 53.

The spelling of 166347438371 in words is "one hundred sixty-six billion, three hundred forty-seven million, four hundred thirty-eight thousand, three hundred seventy-one".