166086505 has 32 divisors (see below), whose sum is σ = 227485440. Its totient is φ = 115395840.

The previous prime is 166086497. The next prime is 166086523. The reversal of 166086505 is 505680661.

It is not a de Polignac number, because 166086505 - 2³ = 166086497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 223164 + ... + 223906.

It is an arithmetic number, because the mean of its divisors is an integer number (7108920).

Almost surely, 2^166086505 is an apocalyptic number.

It is an amenable number.

166086505 is a deficient number, since it is larger than the sum of its proper divisors (61398935).

166086505 is a wasteful number, since it uses less digits than its factorization.

166086505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 166086505 is about 12887.4553345492. The cubic root of 166086505 is about 549.6819152492.

The spelling of 166086505 in words is "one hundred sixty-six million, eighty-six thousand, five hundred five".