6658375891 has 2 divisors, whose sum is σ = 6658375892. Its totient is φ = 6658375890.

The previous prime is 6658375799. The next prime is 6658375967. The reversal of 6658375891 is 1985738566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6658375891 - 2¹⁷ = 6658244819 is a prime.

It is not a weakly prime, because it can be changed into another prime (6658375391) 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, 3329187945 + 3329187946.

It is an arithmetic number, because the mean of its divisors is an integer number (3329187946).

Almost surely, 2^6658375891 is an apocalyptic number.

6658375891 is a deficient number, since it is larger than the sum of its proper divisors (1).

6658375891 is an equidigital number, since it uses as much as digits as its factorization.

6658375891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10886400, while the sum is 58.

The square root of 6658375891 is about 81598.8718733292. The cubic root of 6658375891 is about 1881.2915422577.

The spelling of 6658375891 in words is "six billion, six hundred fifty-eight million, three hundred seventy-five thousand, eight hundred ninety-one".