6837668521 has 4 divisors (see below), whose sum is σ = 6996684112. Its totient is φ = 6678652932.

The previous prime is 6837668507. The next prime is 6837668527. The reversal of 6837668521 is 1258667386.

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 6837668521 - 2¹⁷ = 6837537449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6837668527) 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, 79507731 + ... + 79507816.

It is an arithmetic number, because the mean of its divisors is an integer number (1749171028).

Almost surely, 2^6837668521 is an apocalyptic number.

It is an amenable number.

6837668521 is a deficient number, since it is larger than the sum of its proper divisors (159015591).

6837668521 is a wasteful number, since it uses less digits than its factorization.

6837668521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159015590.

The product of its digits is 2903040, while the sum is 52.

The square root of 6837668521 is about 82690.1960391920. The cubic root of 6837668521 is about 1898.0282889281.

The spelling of 6837668521 in words is "six billion, eight hundred thirty-seven million, six hundred sixty-eight thousand, five hundred twenty-one".