8659699664121 has 24 divisors (see below), whose sum is σ = 13652312943360. Its totient is φ = 5245716060000.

The previous prime is 8659699664117. The next prime is 8659699664137. The reversal of 8659699664121 is 1214669969568.

8659699664121 is a `hidden beast` number, since 8 + 6 + 596 + 9 + 9 + 6 + 6 + 4 + 1 + 21 = 666.

It is not a de Polignac number, because 8659699664121 - 2² = 8659699664117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8659699664121.

It is not an unprimeable number, because it can be changed into a prime (8659699664321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21354505 + ... + 21756246.

It is an arithmetic number, because the mean of its divisors is an integer number (568846372640).

Almost surely, 2^{8659699664121} is an apocalyptic number.

It is an amenable number.

8659699664121 is a deficient number, since it is larger than the sum of its proper divisors (4992613279239).

8659699664121 is a wasteful number, since it uses less digits than its factorization.

8659699664121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43112797 (or 43112794 counting only the distinct ones).

The product of its digits is 302330880, while the sum is 72.

The spelling of 8659699664121 in words is "eight trillion, six hundred fifty-nine billion, six hundred ninety-nine million, six hundred sixty-four thousand, one hundred twenty-one".