166465603 has 2 divisors, whose sum is σ = 166465604. Its totient is φ = 166465602.

The previous prime is 166465601. The next prime is 166465657. The reversal of 166465603 is 306564661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166465603 - 2¹ = 166465601 is a prime.

Together with 166465601, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (166465601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83232801 + 83232802.

It is an arithmetic number, because the mean of its divisors is an integer number (83232802).

Almost surely, 2^166465603 is an apocalyptic number.

166465603 is a deficient number, since it is larger than the sum of its proper divisors (1).

166465603 is an equidigital number, since it uses as much as digits as its factorization.

166465603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 166465603 is about 12902.1549750420. The cubic root of 166465603 is about 550.0998198990.

The spelling of 166465603 in words is "one hundred sixty-six million, four hundred sixty-five thousand, six hundred three".