166531017 has 8 divisors (see below), whose sum is σ = 231695424. Its totient is φ = 106193648.

The previous prime is 166531009. The next prime is 166531019. The reversal of 166531017 is 710135661.

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 166531017 - 2³ = 166531009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166531019) 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, 1206678 + ... + 1206815.

It is an arithmetic number, because the mean of its divisors is an integer number (28961928).

Almost surely, 2^166531017 is an apocalyptic number.

It is an amenable number.

166531017 is a deficient number, since it is larger than the sum of its proper divisors (65164407).

166531017 is a wasteful number, since it uses less digits than its factorization.

166531017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2413519.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 166531017 is about 12904.6897289319. The cubic root of 166531017 is about 550.1718658484.

Adding to 166531017 its reverse (710135661), we get a palindrome (876666678).

The spelling of 166531017 in words is "one hundred sixty-six million, five hundred thirty-one thousand, seventeen".