165006517 has 4 divisors (see below), whose sum is σ = 177699340. Its totient is φ = 152313696.

The previous prime is 165006497. The next prime is 165006533. The reversal of 165006517 is 715600561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 715600561 = 13 ⋅55046197.

It can be written as a sum of positive squares in 2 ways, for example, as 42107121 + 122899396 = 6489^2 + 11086^2 .

It is a cyclic number.

It is not a de Polignac number, because 165006517 - 2¹⁵ = 164973749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165006547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6346392 + ... + 6346417.

It is an arithmetic number, because the mean of its divisors is an integer number (44424835).

Almost surely, 2^165006517 is an apocalyptic number.

It is an amenable number.

165006517 is a deficient number, since it is larger than the sum of its proper divisors (12692823).

165006517 is a wasteful number, since it uses less digits than its factorization.

165006517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12692822.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 165006517 is about 12845.4862500413. The cubic root of 165006517 is about 548.4878762561.

The spelling of 165006517 in words is "one hundred sixty-five million, six thousand, five hundred seventeen".