64165 has 8 divisors (see below), whose sum is σ = 79128. Its totient is φ = 49920.

The previous prime is 64157. The next prime is 64171. The reversal of 64165 is 56146.

It can be written as a sum of positive squares in 4 ways, for example, as 6084 + 58081 = 78^2 + 241^2 .

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

It is not a de Polignac number, because 64165 - 2³ = 64157 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 4 and base 16.

It is a zygodrome in base 4.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49 + ... + 361.

It is an arithmetic number, because the mean of its divisors is an integer number (9891).

2⁶⁴¹⁶⁵ is an apocalyptic number.

It is an amenable number.

64165 is a deficient number, since it is larger than the sum of its proper divisors (14963).

64165 is a wasteful number, since it uses less digits than its factorization.

64165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359.

The product of its digits is 720, while the sum is 22.

The square root of 64165 is about 253.3081127797. The cubic root of 64165 is about 40.0343455012.

The spelling of 64165 in words is "sixty-four thousand, one hundred sixty-five".