165500071 has 8 divisors (see below), whose sum is σ = 186771600. Its totient is φ = 145266240.

The previous prime is 165500063. The next prime is 165500081. The reversal of 165500071 is 170005561.

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

It is a cyclic number.

It is not a de Polignac number, because 165500071 - 2³ = 165500063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165500011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259086 + ... + 259723.

It is an arithmetic number, because the mean of its divisors is an integer number (23346450).

Almost surely, 2^165500071 is an apocalyptic number.

165500071 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

165500071 is a deficient number, since it is larger than the sum of its proper divisors (21271529).

165500071 is a wasteful number, since it uses less digits than its factorization.

165500071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518849.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 165500071 is about 12864.6830897617. The cubic root of 165500071 is about 549.0341959427.

The spelling of 165500071 in words is "one hundred sixty-five million, five hundred thousand, seventy-one".