166531727 has 8 divisors (see below), whose sum is σ = 168941520. Its totient is φ = 164134080.

The previous prime is 166531699. The next prime is 166531747. The reversal of 166531727 is 727135661.

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 166531727 - 2¹⁰ = 166530703 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 (166531747) 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, 26633 + ... + 32285.

It is an arithmetic number, because the mean of its divisors is an integer number (21117690).

Almost surely, 2^166531727 is an apocalyptic number.

166531727 is a deficient number, since it is larger than the sum of its proper divisors (2409793).

166531727 is an equidigital number, since it uses as much as digits as its factorization.

166531727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6073.

The product of its digits is 52920, while the sum is 38.

The square root of 166531727 is about 12904.7172382815. The cubic root of 166531727 is about 550.1726477277.

The spelling of 166531727 in words is "one hundred sixty-six million, five hundred thirty-one thousand, seven hundred twenty-seven".