85987836666 has 24 divisors (see below), whose sum is σ = 196112610720. Its totient is φ = 27154053576.

The previous prime is 85987836643. The next prime is 85987836667. The reversal of 85987836666 is 66663878958.

It is a junction number, because it is equal to n+sod(n) for n = 85987836594 and 85987836603.

It is not an unprimeable number, because it can be changed into a prime (85987836667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125712870 + ... + 125713553.

It is an arithmetic number, because the mean of its divisors is an integer number (8171358780).

Almost surely, 2^85987836666 is an apocalyptic number.

85987836666 is an abundant number, since it is smaller than the sum of its proper divisors (110124774054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85987836666 is a wasteful number, since it uses less digits than its factorization.

85987836666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251426450 (or 251426447 counting only the distinct ones).

The product of its digits is 627056640, while the sum is 72.

The spelling of 85987836666 in words is "eighty-five billion, nine hundred eighty-seven million, eight hundred thirty-six thousand, six hundred sixty-six".