166635473 has 4 divisors (see below), whose sum is σ = 166883748. Its totient is φ = 166387200.

The previous prime is 166635463. The next prime is 166635481. The reversal of 166635473 is 374536661.

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

It can be written as a sum of positive squares in 2 ways, for example, as 84787264 + 81848209 = 9208^2 + 9047^2 .

It is a cyclic number.

It is not a de Polignac number, because 166635473 - 2²⁴ = 149858257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166635473.

It is not an unprimeable number, because it can be changed into a prime (166635463) 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, 123128 + ... + 124473.

It is an arithmetic number, because the mean of its divisors is an integer number (41720937).

Almost surely, 2^166635473 is an apocalyptic number.

It is an amenable number.

166635473 is a deficient number, since it is larger than the sum of its proper divisors (248275).

166635473 is an equidigital number, since it uses as much as digits as its factorization.

166635473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248274.

The product of its digits is 272160, while the sum is 41.

The square root of 166635473 is about 12908.7363053089. The cubic root of 166635473 is about 550.2868729343.

The spelling of 166635473 in words is "one hundred sixty-six million, six hundred thirty-five thousand, four hundred seventy-three".