7687668669 has 4 divisors (see below), whose sum is σ = 10250224896. Its totient is φ = 5125112444.

The previous prime is 7687668629. The next prime is 7687668689. The reversal of 7687668669 is 9668667867.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7687668669 - 2¹¹ = 7687666621 is a prime.

It is a super-2 number, since 2×7687668669² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7687668629) 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 3 ways as a sum of consecutive naturals, for example, 1281278109 + ... + 1281278114.

It is an arithmetic number, because the mean of its divisors is an integer number (2562556224).

Almost surely, 2^7687668669 is an apocalyptic number.

It is an amenable number.

7687668669 is a deficient number, since it is larger than the sum of its proper divisors (2562556227).

7687668669 is a wasteful number, since it uses less digits than its factorization.

7687668669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2562556226.

The product of its digits is 219469824, while the sum is 69.

The square root of 7687668669 is about 87679.3514403477. The cubic root of 7687668669 is about 1973.6261272659.

The spelling of 7687668669 in words is "seven billion, six hundred eighty-seven million, six hundred sixty-eight thousand, six hundred sixty-nine".