166795418 has 16 divisors (see below), whose sum is σ = 252023400. Its totient is φ = 82790400.

The previous prime is 166795417. The next prime is 166795423. The reversal of 166795418 is 814597661.

It can be written as a sum of positive squares in 4 ways, for example, as 165456769 + 1338649 = 12863^2 + 1157^2 .

It is a super-2 number, since 2×166795418² = 55641422931589448, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (166795417) 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 7 ways as a sum of consecutive naturals, for example, 252008 + ... + 252668.

Almost surely, 2^166795418 is an apocalyptic number.

166795418 is a deficient number, since it is larger than the sum of its proper divisors (85227982).

166795418 is a wasteful number, since it uses less digits than its factorization.

166795418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393.

The product of its digits is 362880, while the sum is 47.

The square root of 166795418 is about 12914.9300423967. The cubic root of 166795418 is about 550.4628808529.

The spelling of 166795418 in words is "one hundred sixty-six million, seven hundred ninety-five thousand, four hundred eighteen".