166610565165 has 32 divisors (see below), whose sum is σ = 290862182016. Its totient is φ = 80766709760.

The previous prime is 166610565103. The next prime is 166610565217. The reversal of 166610565165 is 561565016661.

166610565165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166610565165 - 2⁸ = 166610564909 is a prime.

It is a super-2 number, since 2×166610565165² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 887389 + ... + 1058621.

It is an arithmetic number, because the mean of its divisors is an integer number (9089443188).

Almost surely, 2^166610565165 is an apocalyptic number.

166610565165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166610565165 is a deficient number, since it is larger than the sum of its proper divisors (124251616851).

166610565165 is a wasteful number, since it uses less digits than its factorization.

166610565165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177149.

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 166610565165 in words is "one hundred sixty-six billion, six hundred ten million, five hundred sixty-five thousand, one hundred sixty-five".