165868066 has 16 divisors (see below), whose sum is σ = 306218304. Its totient is φ = 65618064.

The previous prime is 165868061. The next prime is 165868091. The reversal of 165868066 is 660868561.

It is not an unprimeable number, because it can be changed into a prime (165868061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455500 + ... + 455863.

It is an arithmetic number, because the mean of its divisors is an integer number (19138644).

Almost surely, 2^165868066 is an apocalyptic number.

165868066 is a deficient number, since it is larger than the sum of its proper divisors (140350238).

165868066 is a wasteful number, since it uses less digits than its factorization.

165868066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911385.

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 165868066 is about 12878.9776768189. The cubic root of 165868066 is about 549.4408267345.

The spelling of 165868066 in words is "one hundred sixty-five million, eight hundred sixty-eight thousand, sixty-six".