166889831 has 8 divisors (see below), whose sum is σ = 171771264. Its totient is φ = 162078840.

The previous prime is 166889797. The next prime is 166889861. The reversal of 166889831 is 138988661.

It is a happy number.

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 166889831 - 2¹⁰ = 166888807 is a prime.

It is a super-2 number, since 2×166889831² = 55704431382417122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166889831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166889861) 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, 12785 + ... + 22298.

It is an arithmetic number, because the mean of its divisors is an integer number (21471408).

Almost surely, 2^166889831 is an apocalyptic number.

166889831 is a deficient number, since it is larger than the sum of its proper divisors (4881433).

166889831 is an equidigital number, since it uses as much as digits as its factorization.

166889831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35221.

The product of its digits is 497664, while the sum is 50.

The square root of 166889831 is about 12918.5847135048. The cubic root of 166889831 is about 550.5667227326.

The spelling of 166889831 in words is "one hundred sixty-six million, eight hundred eighty-nine thousand, eight hundred thirty-one".