7866996687 has 48 divisors (see below), whose sum is σ = 13321780992. Its totient is φ = 4420373760.

The previous prime is 7866996679. The next prime is 7866996689.

7866996687 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7866996687 - 2³ = 7866996679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7866996689) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77878 + ... + 147644.

It is an arithmetic number, because the mean of its divisors is an integer number (277537104).

Almost surely, 2^7866996687 is an apocalyptic number.

7866996687 is a deficient number, since it is larger than the sum of its proper divisors (5454784305).

7866996687 is a wasteful number, since it uses less digits than its factorization.

7866996687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69868 (or 69865 counting only the distinct ones).

The product of its digits is 329204736, while the sum is 72.

The square root of 7866996687 is about 88696.0917233674. The cubic root of 7866996687 is about 1988.8543936932.

The spelling of 7866996687 in words is "seven billion, eight hundred sixty-six million, nine hundred ninety-six thousand, six hundred eighty-seven".