8687662138 has 8 divisors (see below), whose sum is σ = 13036495860. Its totient is φ = 4342163520.

The previous prime is 8687662129. The next prime is 8687662141. The reversal of 8687662138 is 8312667868.

It can be written as a sum of positive squares in 2 ways, for example, as 7606107369 + 1081554769 = 87213^2 + 32887^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 827253 + ... + 837688.

Almost surely, 2^8687662138 is an apocalyptic number.

8687662138 is a deficient number, since it is larger than the sum of its proper divisors (4348833722).

8687662138 is a wasteful number, since it uses less digits than its factorization.

8687662138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667552.

The product of its digits is 4644864, while the sum is 55.

The square root of 8687662138 is about 93207.6291834526. The cubic root of 8687662138 is about 2055.7374184902.

The spelling of 8687662138 in words is "eight billion, six hundred eighty-seven million, six hundred sixty-two thousand, one hundred thirty-eight".