166635163 has 4 divisors (see below), whose sum is σ = 170180640. Its totient is φ = 163089688.

The previous prime is 166635113. The next prime is 166635169. The reversal of 166635163 is 361536661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166635163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166635169) 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 in 3 ways as a sum of consecutive naturals, for example, 1772668 + ... + 1772761.

It is an arithmetic number, because the mean of its divisors is an integer number (42545160).

Almost surely, 2^166635163 is an apocalyptic number.

166635163 is a deficient number, since it is larger than the sum of its proper divisors (3545477).

166635163 is an equidigital number, since it uses as much as digits as its factorization.

166635163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3545476.

The product of its digits is 58320, while the sum is 37.

The square root of 166635163 is about 12908.7242979312. The cubic root of 166635163 is about 550.2865316923.

The spelling of 166635163 in words is "one hundred sixty-six million, six hundred thirty-five thousand, one hundred sixty-three".