166136603 has 2 divisors, whose sum is σ = 166136604. Its totient is φ = 166136602.

The previous prime is 166136573. The next prime is 166136647. The reversal of 166136603 is 306631661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166136603 - 2¹² = 166132507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166136603.

It is not a weakly prime, because it can be changed into another prime (166136683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83068301 + 83068302.

It is an arithmetic number, because the mean of its divisors is an integer number (83068302).

Almost surely, 2^166136603 is an apocalyptic number.

166136603 is a deficient number, since it is larger than the sum of its proper divisors (1).

166136603 is an equidigital number, since it uses as much as digits as its factorization.

166136603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 166136603 is about 12889.3988610796. The cubic root of 166136603 is about 549.7371780096.

The spelling of 166136603 in words is "one hundred sixty-six million, one hundred thirty-six thousand, six hundred three".