166617065 has 8 divisors (see below), whose sum is σ = 200417928. Its totient is φ = 132975360.

The previous prime is 166617041. The next prime is 166617067. The reversal of 166617065 is 560716661.

It can be written as a sum of positive squares in 4 ways, for example, as 2085136 + 164531929 = 1444^2 + 12827^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166617065 - 2¹² = 166612969 is a prime.

It is a super-2 number, since 2×166617065² = 55522492698428450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (166617067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37472 + ... + 41681.

It is an arithmetic number, because the mean of its divisors is an integer number (25052241).

Almost surely, 2^166617065 is an apocalyptic number.

It is an amenable number.

166617065 is a deficient number, since it is larger than the sum of its proper divisors (33800863).

166617065 is an equidigital number, since it uses as much as digits as its factorization.

166617065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79579.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 166617065 is about 12908.0232801154. The cubic root of 166617065 is about 550.2666090341.

The spelling of 166617065 in words is "one hundred sixty-six million, six hundred seventeen thousand, sixty-five".