165643106 has 8 divisors (see below), whose sum is σ = 256479744. Its totient is φ = 80149860.

The previous prime is 165643097. The next prime is 165643109. The reversal of 165643106 is 601346561.

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

It is not an unprimeable number, because it can be changed into a prime (165643109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1335770 + ... + 1335893.

It is an arithmetic number, because the mean of its divisors is an integer number (32059968).

Almost surely, 2^165643106 is an apocalyptic number.

165643106 is a deficient number, since it is larger than the sum of its proper divisors (90836638).

165643106 is a wasteful number, since it uses less digits than its factorization.

165643106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2671696.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 165643106 is about 12870.2411010828. The cubic root of 165643106 is about 549.1923197285.

Adding to 165643106 its reverse (601346561), we get a palindrome (766989667).

The spelling of 165643106 in words is "one hundred sixty-five million, six hundred forty-three thousand, one hundred six".