7686741921 has 4 divisors (see below), whose sum is σ = 10248989232. Its totient is φ = 5124494612.

The previous prime is 7686741911. The next prime is 7686741961. The reversal of 7686741921 is 1291476867.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1291476867 = 3 ⋅430492289.

It is a cyclic number.

It is not a de Polignac number, because 7686741921 - 2⁶ = 7686741857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7686741911) 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, 1281123651 + ... + 1281123656.

It is an arithmetic number, because the mean of its divisors is an integer number (2562247308).

Almost surely, 2^7686741921 is an apocalyptic number.

It is an amenable number.

7686741921 is a deficient number, since it is larger than the sum of its proper divisors (2562247311).

7686741921 is a wasteful number, since it uses less digits than its factorization.

7686741921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2562247310.

The product of its digits is 1016064, while the sum is 51.

The square root of 7686741921 is about 87674.0664107694. The cubic root of 7686741921 is about 1973.5468172416.

The spelling of 7686741921 in words is "seven billion, six hundred eighty-six million, seven hundred forty-one thousand, nine hundred twenty-one".