65882068508509 has 6 divisors (see below), whose sum is σ = 72415827368990. Its totient is φ = 59892789553080.

The previous prime is 65882068508437. The next prime is 65882068508521. The reversal of 65882068508509 is 90580586028856.

It can be written as a sum of positive squares in only one way, i.e., 61477799645284 + 4404268863225 = 7840778^2 + 2098635^2 .

It is a de Polignac number, because none of the positive numbers 2^k-65882068508509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65882068508209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 272239952394 + ... + 272239952635.

Almost surely, 2^{65882068508509} is an apocalyptic number.

It is an amenable number.

65882068508509 is a deficient number, since it is larger than the sum of its proper divisors (6533758860481).

65882068508509 is a wasteful number, since it uses less digits than its factorization.

65882068508509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544479905051 (or 544479905040 counting only the distinct ones).

The product of its (nonzero) digits is 331776000, while the sum is 70.

The spelling of 65882068508509 in words is "sixty-five trillion, eight hundred eighty-two billion, sixty-eight million, five hundred eight thousand, five hundred nine".