166179901 has 8 divisors (see below), whose sum is σ = 169400504. Its totient is φ = 162984960.

The previous prime is 166179887. The next prime is 166179911. The reversal of 166179901 is 109971661.

It can be written as a sum of positive squares in 4 ways, for example, as 18071001 + 148108900 = 4251^2 + 12170^2 .

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 166179901 - 2¹⁵ = 166147133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166179911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6925 + ... + 19501.

It is an arithmetic number, because the mean of its divisors is an integer number (21175063).

Almost surely, 2^166179901 is an apocalyptic number.

It is an amenable number.

166179901 is a deficient number, since it is larger than the sum of its proper divisors (3220603).

166179901 is a wasteful number, since it uses less digits than its factorization.

166179901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12831.

The product of its (nonzero) digits is 20412, while the sum is 40.

The square root of 166179901 is about 12891.0783489978. The cubic root of 166179901 is about 549.7849307874.

The spelling of 166179901 in words is "one hundred sixty-six million, one hundred seventy-nine thousand, nine hundred one".