166315447 has 2 divisors, whose sum is σ = 166315448. Its totient is φ = 166315446.

The previous prime is 166315427. The next prime is 166315459. The reversal of 166315447 is 744513661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166315447 - 2¹⁵ = 166282679 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 (166315427) 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, 83157723 + 83157724.

It is an arithmetic number, because the mean of its divisors is an integer number (83157724).

Almost surely, 2^166315447 is an apocalyptic number.

166315447 is a deficient number, since it is larger than the sum of its proper divisors (1).

166315447 is an equidigital number, since it uses as much as digits as its factorization.

166315447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 37.

The square root of 166315447 is about 12896.3346343060. The cubic root of 166315447 is about 549.9343690281.

The spelling of 166315447 in words is "one hundred sixty-six million, three hundred fifteen thousand, four hundred forty-seven".