85258661 has 8 divisors (see below), whose sum is σ = 85998744. Its totient is φ = 84522240.

The previous prime is 85258633. The next prime is 85258669. The reversal of 85258661 is 16685258.

It can be written as a sum of positive squares in 4 ways, for example, as 7924225 + 77334436 = 2815^2 + 8794^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 85258661 - 2⁶ = 85258597 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 (85258669) 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 7 ways as a sum of consecutive naturals, for example, 63881 + ... + 65201.

It is an arithmetic number, because the mean of its divisors is an integer number (10749843).

Almost surely, 2^85258661 is an apocalyptic number.

It is an amenable number.

85258661 is a deficient number, since it is larger than the sum of its proper divisors (740083).

85258661 is a wasteful number, since it uses less digits than its factorization.

85258661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1831.

The product of its digits is 115200, while the sum is 41.

The square root of 85258661 is about 9233.5616638435. The cubic root of 85258661 is about 440.1285110158.

The spelling of 85258661 in words is "eighty-five million, two hundred fifty-eight thousand, six hundred sixty-one".