85661684 has 12 divisors (see below), whose sum is σ = 151235364. Its totient is φ = 42451584.

The previous prime is 85661677. The next prime is 85661717. The reversal of 85661684 is 48616658.

It can be written as a sum of positive squares in 2 ways, for example, as 33965584 + 51696100 = 5828^2 + 7190^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94307 + ... + 95210.

It is an arithmetic number, because the mean of its divisors is an integer number (12602947).

Almost surely, 2^85661684 is an apocalyptic number.

It is an amenable number.

85661684 is a deficient number, since it is larger than the sum of its proper divisors (65573680).

85661684 is a wasteful number, since it uses less digits than its factorization.

85661684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189634 (or 189632 counting only the distinct ones).

The product of its digits is 276480, while the sum is 44.

The square root of 85661684 is about 9255.3597444940. The cubic root of 85661684 is about 440.8209260896.

The spelling of 85661684 in words is "eighty-five million, six hundred sixty-one thousand, six hundred eighty-four".