817065065 has 4 divisors (see below), whose sum is σ = 980478084. Its totient is φ = 653652048.

The previous prime is 817065017. The next prime is 817065083. The reversal of 817065065 is 560560718.

It is a happy number.

817065065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 644195161 + 172869904 = 25381^2 + 13148^2 .

It is a cyclic number.

It is not a de Polignac number, because 817065065 - 2⁶ = 817065001 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81706502 + ... + 81706511.

It is an arithmetic number, because the mean of its divisors is an integer number (245119521).

Almost surely, 2^817065065 is an apocalyptic number.

It is an amenable number.

817065065 is a deficient number, since it is larger than the sum of its proper divisors (163413019).

817065065 is a wasteful number, since it uses less digits than its factorization.

817065065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163413018.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 817065065 is about 28584.3500013556. The cubic root of 817065065 is about 934.8721321322.

The spelling of 817065065 in words is "eight hundred seventeen million, sixty-five thousand, sixty-five".