86666024681 has 4 divisors (see below), whose sum is σ = 86697101700. Its totient is φ = 86634947664.

The previous prime is 86666024677. The next prime is 86666024729. The reversal of 86666024681 is 18642066668.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23973877225 + 62692147456 = 154835^2 + 250384^2 .

It is a cyclic number.

It is not a de Polignac number, because 86666024681 - 2² = 86666024677 is a prime.

It is a super-2 number, since 2×86666024681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86666024611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15534326 + ... + 15539903.

It is an arithmetic number, because the mean of its divisors is an integer number (21674275425).

Almost surely, 2^86666024681 is an apocalyptic number.

It is an amenable number.

86666024681 is a deficient number, since it is larger than the sum of its proper divisors (31077019).

86666024681 is a wasteful number, since it uses less digits than its factorization.

86666024681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31077018.

The product of its (nonzero) digits is 3981312, while the sum is 53.

The spelling of 86666024681 in words is "eighty-six billion, six hundred sixty-six million, twenty-four thousand, six hundred eighty-one".