166842418 has 8 divisors (see below), whose sum is σ = 250353180. Its totient is φ = 83391360.

The previous prime is 166842409. The next prime is 166842419. The reversal of 166842418 is 814248661.

It can be written as a sum of positive squares in 2 ways, for example, as 151216209 + 15626209 = 12297^2 + 3953^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (166842419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7123 + ... + 19606.

Almost surely, 2^166842418 is an apocalyptic number.

166842418 is a deficient number, since it is larger than the sum of its proper divisors (83510762).

166842418 is a wasteful number, since it uses less digits than its factorization.

166842418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29852.

The product of its digits is 73728, while the sum is 40.

The square root of 166842418 is about 12916.7495137128. The cubic root of 166842418 is about 550.5145795666.

The spelling of 166842418 in words is "one hundred sixty-six million, eight hundred forty-two thousand, four hundred eighteen".