166618417 has 16 divisors (see below), whose sum is σ = 199406592. Its totient is φ = 136121040.

The previous prime is 166618409. The next prime is 166618447. The reversal of 166618417 is 714816661.

It is a cyclic number.

It is not a de Polignac number, because 166618417 - 2³ = 166618409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166618417.

It is not an unprimeable number, because it can be changed into a prime (166618447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47742 + ... + 51112.

It is an arithmetic number, because the mean of its divisors is an integer number (12462912).

Almost surely, 2^166618417 is an apocalyptic number.

It is an amenable number.

166618417 is a deficient number, since it is larger than the sum of its proper divisors (32788175).

166618417 is a wasteful number, since it uses less digits than its factorization.

166618417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3708.

The product of its digits is 48384, while the sum is 40.

The square root of 166618417 is about 12908.0756505375. The cubic root of 166618417 is about 550.2680973939.

The spelling of 166618417 in words is "one hundred sixty-six million, six hundred eighteen thousand, four hundred seventeen".