7864664687 has 16 divisors (see below), whose sum is σ = 8620117632. Its totient is φ = 7116028320.

The previous prime is 7864664671. The next prime is 7864664701.

7864664687 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 7864664687 - 2⁴ = 7864664671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7864664617) 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, 4211528 + ... + 4213394.

It is an arithmetic number, because the mean of its divisors is an integer number (538757352).

Almost surely, 2^7864664687 is an apocalyptic number.

7864664687 is a deficient number, since it is larger than the sum of its proper divisors (755452945).

7864664687 is a wasteful number, since it uses less digits than its factorization.

7864664687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3478.

The product of its digits is 65028096, while the sum is 62.

The square root of 7864664687 is about 88682.9447357269. The cubic root of 7864664687 is about 1988.6578567348.

The spelling of 7864664687 in words is "seven billion, eight hundred sixty-four million, six hundred sixty-four thousand, six hundred eighty-seven".