85660425 has 18 divisors (see below), whose sum is σ = 153427742. Its totient is φ = 45685440.

The previous prime is 85660391. The next prime is 85660459. The reversal of 85660425 is 52406658.

It is an interprime number because it is at equal distance from previous prime (85660391) and next prime (85660459).

It can be written as a sum of positive squares in 3 ways, for example, as 9290304 + 76370121 = 3048^2 + 8739^2 .

It is not a de Polignac number, because 85660425 - 2⁶ = 85660361 is a prime.

It is a super-2 number, since 2×85660425² = 14675416822361250, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85660425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 190132 + ... + 190581.

Almost surely, 2^85660425 is an apocalyptic number.

It is an amenable number.

85660425 is a deficient number, since it is larger than the sum of its proper divisors (67767317).

85660425 is a wasteful number, since it uses less digits than its factorization.

85660425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380729 (or 380721 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 85660425 is about 9255.2917295999. The cubic root of 85660425 is about 440.8187664454.

The spelling of 85660425 in words is "eighty-five million, six hundred sixty thousand, four hundred twenty-five".