86566802687686 has 4 divisors (see below), whose sum is σ = 129850204031532. Its totient is φ = 43283401343842.

The previous prime is 86566802687639. The next prime is 86566802687749. The reversal of 86566802687686 is 68678620866568.

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

It is a super-2 number, since 2×86566802687686² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21641700671920 + ... + 21641700671923.

It is an arithmetic number, because the mean of its divisors is an integer number (32462551007883).

Almost surely, 2^{86566802687686} is an apocalyptic number.

86566802687686 is a deficient number, since it is larger than the sum of its proper divisors (43283401343846).

86566802687686 is a wasteful number, since it uses less digits than its factorization.

86566802687686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43283401343845.

The product of its (nonzero) digits is 13377208320, while the sum is 82.

The spelling of 86566802687686 in words is "eighty-six trillion, five hundred sixty-six billion, eight hundred two million, six hundred eighty-seven thousand, six hundred eighty-six".