85661707 has 4 divisors (see below), whose sum is σ = 86096736. Its totient is φ = 85226680.

The previous prime is 85661677. The next prime is 85661717. The reversal of 85661707 is 70716658.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70716658 = 2 ⋅35358329.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85661707 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 85661707.

It is not an unprimeable number, because it can be changed into a prime (85661717) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 217219 + ... + 217612.

It is an arithmetic number, because the mean of its divisors is an integer number (21524184).

Almost surely, 2^85661707 is an apocalyptic number.

85661707 is a deficient number, since it is larger than the sum of its proper divisors (435029).

85661707 is a wasteful number, since it uses less digits than its factorization.

85661707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435028.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 85661707 is about 9255.3609870172. The cubic root of 85661707 is about 440.8209655428.

It can be divided in two parts, 85661 and 707, that added together give a palindrome (86368).

The spelling of 85661707 in words is "eighty-five million, six hundred sixty-one thousand, seven hundred seven".