165810002 has 8 divisors (see below), whose sum is σ = 248791116. Its totient is φ = 82879632.

The previous prime is 165809999. The next prime is 165810011. The reversal of 165810002 is 200018561.

It can be written as a sum of positive squares in 2 ways, for example, as 153983281 + 11826721 = 12409^2 + 3439^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 165810002.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3053 + ... + 18464.

Almost surely, 2^165810002 is an apocalyptic number.

165810002 is a deficient number, since it is larger than the sum of its proper divisors (82981114).

165810002 is a wasteful number, since it uses less digits than its factorization.

165810002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25372.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 165810002 is about 12876.7232633151. The cubic root of 165810002 is about 549.3767065850.

Adding to 165810002 its reverse (200018561), we get a palindrome (365828563).

The spelling of 165810002 in words is "one hundred sixty-five million, eight hundred ten thousand, two".