166443718 has 16 divisors (see below), whose sum is σ = 288771840. Its totient is φ = 70473096.

The previous prime is 166443713. The next prime is 166443721. The reversal of 166443718 is 817344661.

It is a super-2 number, since 2×166443718² = 55407022523327048, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166443713) 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 7 ways as a sum of consecutive naturals, for example, 70458 + ... + 72781.

It is an arithmetic number, because the mean of its divisors is an integer number (18048240).

Almost surely, 2^166443718 is an apocalyptic number.

166443718 is a deficient number, since it is larger than the sum of its proper divisors (122328122).

166443718 is a wasteful number, since it uses less digits than its factorization.

166443718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143331.

The product of its digits is 96768, while the sum is 40.

The square root of 166443718 is about 12901.3068330305. The cubic root of 166443718 is about 550.0757118912.

The spelling of 166443718 in words is "one hundred sixty-six million, four hundred forty-three thousand, seven hundred eighteen".