7867887687 has 24 divisors (see below), whose sum is σ = 12440243088. Its totient is φ = 4752124800.

The previous prime is 7867887667. The next prime is 7867887701.

7867887687 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7867887687 - 2⁸ = 7867887431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7867887667) 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, 106614 + ... + 164627.

It is an arithmetic number, because the mean of its divisors is an integer number (518343462).

Almost surely, 2^7867887687 is an apocalyptic number.

7867887687 is a deficient number, since it is larger than the sum of its proper divisors (4572355401).

7867887687 is a wasteful number, since it uses less digits than its factorization.

7867887687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271551 (or 271548 counting only the distinct ones).

The product of its digits is 354041856, while the sum is 72.

The square root of 7867887687 is about 88701.1143503846. The cubic root of 7867887687 is about 1988.9294753895.

The spelling of 7867887687 in words is "seven billion, eight hundred sixty-seven million, eight hundred eighty-seven thousand, six hundred eighty-seven".