166661306301 has 48 divisors (see below), whose sum is σ = 282529866240. Its totient is φ = 86741544960.

The previous prime is 166661306219. The next prime is 166661306323. The reversal of 166661306301 is 103603166661.

It is not a de Polignac number, because 166661306301 - 2¹⁰ = 166661305277 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 166661306301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166661306101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 998196 + ... + 1153133.

It is an arithmetic number, because the mean of its divisors is an integer number (5886038880).

Almost surely, 2^166661306301 is an apocalyptic number.

It is an amenable number.

166661306301 is a deficient number, since it is larger than the sum of its proper divisors (115868559939).

166661306301 is a wasteful number, since it uses less digits than its factorization.

166661306301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151394 (or 2151387 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 39.

The spelling of 166661306301 in words is "one hundred sixty-six billion, six hundred sixty-one million, three hundred six thousand, three hundred one".