166636841 has 8 divisors (see below), whose sum is σ = 191282880. Its totient is φ = 142201008.

The previous prime is 166636831. The next prime is 166636843. The reversal of 166636841 is 148636661.

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

It is a cyclic number.

It is not a de Polignac number, because 166636841 - 2¹⁰ = 166635817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166636843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50846 + ... + 54023.

It is an arithmetic number, because the mean of its divisors is an integer number (23910360).

Almost surely, 2^166636841 is an apocalyptic number.

It is an amenable number.

166636841 is a deficient number, since it is larger than the sum of its proper divisors (24646039).

166636841 is a wasteful number, since it uses less digits than its factorization.

166636841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105103.

The product of its digits is 124416, while the sum is 41.

The square root of 166636841 is about 12908.7892925712. The cubic root of 166636841 is about 550.2883787969.

The spelling of 166636841 in words is "one hundred sixty-six million, six hundred thirty-six thousand, eight hundred forty-one".