166476647 has 2 divisors, whose sum is σ = 166476648. Its totient is φ = 166476646.

The previous prime is 166476643. The next prime is 166476649. The reversal of 166476647 is 746674661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166476647 - 2² = 166476643 is a prime.

Together with 166476649, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166476643) 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, 83238323 + 83238324.

It is an arithmetic number, because the mean of its divisors is an integer number (83238324).

Almost surely, 2^166476647 is an apocalyptic number.

166476647 is a deficient number, since it is larger than the sum of its proper divisors (1).

166476647 is an equidigital number, since it uses as much as digits as its factorization.

166476647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 47.

The square root of 166476647 is about 12902.5829584622. The cubic root of 166476647 is about 550.1119849108. Note that the first 3 decimals are identical.

The spelling of 166476647 in words is "one hundred sixty-six million, four hundred seventy-six thousand, six hundred forty-seven".