166114409 has 2 divisors, whose sum is σ = 166114410. Its totient is φ = 166114408.

The previous prime is 166114381. The next prime is 166114433. The reversal of 166114409 is 904411661.

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., 117072400 + 49042009 = 10820^2 + 7003^2 .

It is a cyclic number.

It is not a de Polignac number, because 166114409 - 2¹⁶ = 166048873 is a prime.

It is not a weakly prime, because it can be changed into another prime (166114439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83057204 + 83057205.

It is an arithmetic number, because the mean of its divisors is an integer number (83057205).

Almost surely, 2^166114409 is an apocalyptic number.

It is an amenable number.

166114409 is a deficient number, since it is larger than the sum of its proper divisors (1).

166114409 is an equidigital number, since it uses as much as digits as its factorization.

166114409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 166114409 is about 12888.5378922514. The cubic root of 166114409 is about 549.7126973312.

The spelling of 166114409 in words is "one hundred sixty-six million, one hundred fourteen thousand, four hundred nine".