6687535427 has 2 divisors, whose sum is σ = 6687535428. Its totient is φ = 6687535426.

The previous prime is 6687535409. The next prime is 6687535433. The reversal of 6687535427 is 7245357866.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6687535427 - 2¹⁶ = 6687469891 is a prime.

It is not a weakly prime, because it can be changed into another prime (6687435427) 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 as a sum of consecutive naturals, namely, 3343767713 + 3343767714.

It is an arithmetic number, because the mean of its divisors is an integer number (3343767714).

Almost surely, 2^6687535427 is an apocalyptic number.

6687535427 is a deficient number, since it is larger than the sum of its proper divisors (1).

6687535427 is an equidigital number, since it uses as much as digits as its factorization.

6687535427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8467200, while the sum is 53.

The square root of 6687535427 is about 81777.3527756921. The cubic root of 6687535427 is about 1884.0338377232.

The spelling of 6687535427 in words is "six billion, six hundred eighty-seven million, five hundred thirty-five thousand, four hundred twenty-seven".