165500670000 has 100 divisors (see below), whose sum is σ = 534258326360. Its totient is φ = 44133504000.

The previous prime is 165500669981. The next prime is 165500670019. The reversal of 165500670000 is 76005561.

It is an interprime number because it is at equal distance from previous prime (165500669981) and next prime (165500670019).

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 165500670000.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2728345 + ... + 2788344.

Almost surely, 2^165500670000 is an apocalyptic number.

165500670000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165500670000 is an abundant number, since it is smaller than the sum of its proper divisors (368757656360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165500670000 is an equidigital number, since it uses as much as digits as its factorization.

165500670000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5516720 (or 5516699 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 30.

Adding to 165500670000 its reverse (76005561), we get a palindrome (165576675561).

The spelling of 165500670000 in words is "one hundred sixty-five billion, five hundred million, six hundred seventy thousand".