85665350066 has 4 divisors (see below), whose sum is σ = 128498025102. Its totient is φ = 42832675032.

The previous prime is 85665350039. The next prime is 85665350123. The reversal of 85665350066 is 66005356658.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66005356658 = 2 ⋅33002678329.

It can be written as a sum of positive squares in only one way, i.e., 59119491025 + 26545859041 = 243145^2 + 162929^2 .

It is a junction number, because it is equal to n+sod(n) for n = 85665349996 and 85665350023.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21416337515 + ... + 21416337518.

Almost surely, 2^85665350066 is an apocalyptic number.

85665350066 is a deficient number, since it is larger than the sum of its proper divisors (42832675036).

85665350066 is a wasteful number, since it uses less digits than its factorization.

85665350066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42832675035.

The product of its (nonzero) digits is 3888000, while the sum is 50.

The spelling of 85665350066 in words is "eighty-five billion, six hundred sixty-five million, three hundred fifty thousand, sixty-six".