166345447 has 2 divisors, whose sum is σ = 166345448. Its totient is φ = 166345446.

The previous prime is 166345427. The next prime is 166345463. The reversal of 166345447 is 744543661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166345447 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166345427) 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, 83172723 + 83172724.

It is an arithmetic number, because the mean of its divisors is an integer number (83172724).

Almost surely, 2^166345447 is an apocalyptic number.

166345447 is a deficient number, since it is larger than the sum of its proper divisors (1).

166345447 is an equidigital number, since it uses as much as digits as its factorization.

166345447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 40.

The square root of 166345447 is about 12897.4977030430. The cubic root of 166345447 is about 549.9674327824.

The spelling of 166345447 in words is "one hundred sixty-six million, three hundred forty-five thousand, four hundred forty-seven".