166662242 has 4 divisors (see below), whose sum is σ = 249993366. Its totient is φ = 83331120.

The previous prime is 166662241. The next prime is 166662259. The reversal of 166662242 is 242266661.

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

It can be written as a sum of positive squares in only one way, i.e., 162078361 + 4583881 = 12731^2 + 2141^2 .

It is not an unprimeable number, because it can be changed into a prime (166662241) 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 as a sum of consecutive naturals, namely, 41665559 + ... + 41665562.

Almost surely, 2^166662242 is an apocalyptic number.

166662242 is a deficient number, since it is larger than the sum of its proper divisors (83331124).

166662242 is an equidigital number, since it uses as much as digits as its factorization.

166662242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83331123.

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

The square root of 166662242 is about 12909.7731196176. The cubic root of 166662242 is about 550.3163381302.

The spelling of 166662242 in words is "one hundred sixty-six million, six hundred sixty-two thousand, two hundred forty-two".