166714409 has 2 divisors, whose sum is σ = 166714410. Its totient is φ = 166714408.

The previous prime is 166714369. The next prime is 166714433. The reversal of 166714409 is 904417661.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110838784 + 55875625 = 10528^2 + 7475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166714409 is a prime.

It is not a weakly prime, because it can be changed into another prime (166714459) 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, 83357204 + 83357205.

It is an arithmetic number, because the mean of its divisors is an integer number (83357205).

Almost surely, 2^166714409 is an apocalyptic number.

It is an amenable number.

166714409 is a deficient number, since it is larger than the sum of its proper divisors (1).

166714409 is an equidigital number, since it uses as much as digits as its factorization.

166714409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 166714409 is about 12911.7934075790. The cubic root of 166714409 is about 550.3737503696.

The spelling of 166714409 in words is "one hundred sixty-six million, seven hundred fourteen thousand, four hundred nine".