7686666867 has 16 divisors (see below), whose sum is σ = 11243076480. Its totient is φ = 4632556800.

The previous prime is 7686666863. The next prime is 7686666881.

7686666867 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7686666867 - 2² = 7686666863 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7686666798 and 7686666807.

It is not an unprimeable number, because it can be changed into a prime (7686666863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 644734 + ... + 656547.

It is an arithmetic number, because the mean of its divisors is an integer number (702692280).

Almost surely, 2^7686666867 is an apocalyptic number.

7686666867 is a deficient number, since it is larger than the sum of its proper divisors (3556409613).

7686666867 is a wasteful number, since it uses less digits than its factorization.

7686666867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301474.

The product of its digits is 146313216, while the sum is 66.

The square root of 7686666867 is about 87673.6383812147. The cubic root of 7686666867 is about 1973.5403939278.

The spelling of 7686666867 in words is "seven billion, six hundred eighty-six million, six hundred sixty-six thousand, eight hundred sixty-seven".