86704686621 has 48 divisors (see below), whose sum is σ = 150812787840. Its totient is φ = 46891768320.

The previous prime is 86704686619. The next prime is 86704686631. The reversal of 86704686621 is 12668640768.

86704686621 is a `hidden beast` number, since 8 + 6 + 7 + 0 + 4 + 6 + 8 + 6 + 621 = 666.

It is not a de Polignac number, because 86704686621 - 2¹ = 86704686619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86704686631) 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 47 ways as a sum of consecutive naturals, for example, 1201441 + ... + 1271561.

It is an arithmetic number, because the mean of its divisors is an integer number (3141933080).

Almost surely, 2^86704686621 is an apocalyptic number.

It is an amenable number.

86704686621 is a deficient number, since it is larger than the sum of its proper divisors (64108101219).

86704686621 is a wasteful number, since it uses less digits than its factorization.

86704686621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71186 (or 71183 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 86704686621 in words is "eighty-six billion, seven hundred four million, six hundred eighty-six thousand, six hundred twenty-one".