165009106 has 12 divisors (see below), whose sum is σ = 262192302. Its totient is φ = 77616096.

The previous prime is 165009079. The next prime is 165009121. The reversal of 165009106 is 601900561.

It can be written as a sum of positive squares in only one way, i.e., 121330225 + 43678881 = 11015^2 + 6609^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73801 + ... + 76003.

Almost surely, 2^165009106 is an apocalyptic number.

165009106 is a deficient number, since it is larger than the sum of its proper divisors (97183196).

165009106 is an frugal number, since it uses more digits than its factorization.

165009106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4425 (or 2222 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 165009106 is about 12845.5870243442. The cubic root of 165009106 is about 548.4907448856.

Adding to 165009106 its reverse (601900561), we get a palindrome (766909667).

The spelling of 165009106 in words is "one hundred sixty-five million, nine thousand, one hundred six".