165640102 has 8 divisors (see below), whose sum is σ = 248998176. Its totient is φ = 82640712.

The previous prime is 165640091. The next prime is 165640117. The reversal of 165640102 is 201046561.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88513 + ... + 90364.

It is an arithmetic number, because the mean of its divisors is an integer number (31124772).

Almost surely, 2^165640102 is an apocalyptic number.

165640102 is a deficient number, since it is larger than the sum of its proper divisors (83358074).

165640102 is a wasteful number, since it uses less digits than its factorization.

165640102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179342.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 165640102 is about 12870.1243972232. The cubic root of 165640102 is about 549.1889997721.

Adding to 165640102 its reverse (201046561), we get a palindrome (366686663).

The spelling of 165640102 in words is "one hundred sixty-five million, six hundred forty thousand, one hundred two".