166664042 has 8 divisors (see below), whose sum is σ = 252573636. Its totient is φ = 82472832.

The previous prime is 166664033. The next prime is 166664053. The reversal of 166664042 is 240466661.

It can be written as a sum of positive squares in 2 ways, for example, as 166384201 + 279841 = 12899^2 + 529^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 166663993 and 166664011.

It is an unprimeable number.

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, 429353 + ... + 429740.

Almost surely, 2^166664042 is an apocalyptic number.

166664042 is a deficient number, since it is larger than the sum of its proper divisors (85909594).

166664042 is an equidigital number, since it uses as much as digits as its factorization.

166664042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859192.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 166664042 is about 12909.8428340550. The cubic root of 166664042 is about 550.3183193145.

The spelling of 166664042 in words is "one hundred sixty-six million, six hundred sixty-four thousand, forty-two".