85665434 has 8 divisors (see below), whose sum is σ = 131971188. Its totient is φ = 41675040.

The previous prime is 85665407. The next prime is 85665439. The reversal of 85665434 is 43456658.

It can be written as a sum of positive squares in 2 ways, for example, as 84695209 + 970225 = 9203^2 + 985^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 85665391 and 85665400.

It is not an unprimeable number, because it can be changed into a prime (85665439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578747 + ... + 578894.

Almost surely, 2^85665434 is an apocalyptic number.

85665434 is a deficient number, since it is larger than the sum of its proper divisors (46305754).

85665434 is a wasteful number, since it uses less digits than its factorization.

85665434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157680.

The product of its digits is 345600, while the sum is 41.

The square root of 85665434 is about 9255.5623275952. The cubic root of 85665434 is about 440.8273585818.

The spelling of 85665434 in words is "eighty-five million, six hundred sixty-five thousand, four hundred thirty-four".