166660101 has 12 divisors (see below), whose sum is σ = 241064928. Its totient is φ = 110952744.

The previous prime is 166660051. The next prime is 166660127. The reversal of 166660101 is 101066661.

It is not a de Polignac number, because 166660101 - 2¹¹ = 166658053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166660141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5775 + ... + 19148.

It is an arithmetic number, because the mean of its divisors is an integer number (20088744).

Almost surely, 2^166660101 is an apocalyptic number.

It is an amenable number.

166660101 is a deficient number, since it is larger than the sum of its proper divisors (74404827).

166660101 is a wasteful number, since it uses less digits than its factorization.

166660101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25672 (or 25669 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 166660101 is about 12909.6901976771. The cubic root of 166660101 is about 550.3139816030.

The spelling of 166660101 in words is "one hundred sixty-six million, six hundred sixty thousand, one hundred one".