166636201 has 16 divisors (see below), whose sum is σ = 173401600. Its totient is φ = 160056000.

The previous prime is 166636199. The next prime is 166636207. The reversal of 166636201 is 102636661.

It is a cyclic number.

It is not a de Polignac number, because 166636201 - 2¹ = 166636199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166636207) 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, 727555 + ... + 727783.

It is an arithmetic number, because the mean of its divisors is an integer number (10837600).

Almost surely, 2^166636201 is an apocalyptic number.

It is an amenable number.

166636201 is a deficient number, since it is larger than the sum of its proper divisors (6765399).

166636201 is a wasteful number, since it uses less digits than its factorization.

166636201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 166636201 is about 12908.7645032358. The cubic root of 166636201 is about 550.2876743008.

The spelling of 166636201 in words is "one hundred sixty-six million, six hundred thirty-six thousand, two hundred one".