86697656639 has 12 divisors (see below), whose sum is σ = 97511957928. Its totient is φ = 76983115440.

The previous prime is 86697656593. The next prime is 86697656641. The reversal of 86697656639 is 93665679668.

It is not a de Polignac number, because 86697656639 - 2¹² = 86697652543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86697656039) 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 11 ways as a sum of consecutive naturals, for example, 8326304 + ... + 8336709.

It is an arithmetic number, because the mean of its divisors is an integer number (8125996494).

Almost surely, 2^86697656639 is an apocalyptic number.

86697656639 is a deficient number, since it is larger than the sum of its proper divisors (10814301289).

86697656639 is a wasteful number, since it uses less digits than its factorization.

86697656639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16663078 (or 16663067 counting only the distinct ones).

The product of its digits is 529079040, while the sum is 71.

The spelling of 86697656639 in words is "eighty-six billion, six hundred ninety-seven million, six hundred fifty-six thousand, six hundred thirty-nine".