166404463 has 2 divisors, whose sum is σ = 166404464. Its totient is φ = 166404462.

The previous prime is 166404443. The next prime is 166404481. The reversal of 166404463 is 364404661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166404463 - 2¹⁷ = 166273391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166404443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83202231 + 83202232.

It is an arithmetic number, because the mean of its divisors is an integer number (83202232).

Almost surely, 2^166404463 is an apocalyptic number.

166404463 is a deficient number, since it is larger than the sum of its proper divisors (1).

166404463 is an equidigital number, since it uses as much as digits as its factorization.

166404463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 166404463 is about 12899.7853858117. The cubic root of 166404463 is about 550.0324641994.

The spelling of 166404463 in words is "one hundred sixty-six million, four hundred four thousand, four hundred sixty-three".