166560665 has 16 divisors (see below), whose sum is σ = 203164416. Its totient is φ = 131068800.

The previous prime is 166560661. The next prime is 166560673. The reversal of 166560665 is 566065661.

It is not a de Polignac number, because 166560665 - 2² = 166560661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166560661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111725 + ... + 113205.

It is an arithmetic number, because the mean of its divisors is an integer number (12697776).

Almost surely, 2^166560665 is an apocalyptic number.

It is an amenable number.

166560665 is a deficient number, since it is larger than the sum of its proper divisors (36603751).

166560665 is a wasteful number, since it uses less digits than its factorization.

166560665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 166560665 is about 12905.8384074805. The cubic root of 166560665 is about 550.2045134754.

The spelling of 166560665 in words is "one hundred sixty-six million, five hundred sixty thousand, six hundred sixty-five".