6648692489 has 2 divisors, whose sum is σ = 6648692490. Its totient is φ = 6648692488.

The previous prime is 6648692473. The next prime is 6648692563. The reversal of 6648692489 is 9842968466.

6648692489 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4368152464 + 2280540025 = 66092^2 + 47755^2 .

It is a cyclic number.

It is not a de Polignac number, because 6648692489 - 2⁴ = 6648692473 is a prime.

It is a super-2 number, since 2×6648692489² = 88410223626570030242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6648695489) 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, 3324346244 + 3324346245.

It is an arithmetic number, because the mean of its divisors is an integer number (3324346245).

Almost surely, 2^6648692489 is an apocalyptic number.

It is an amenable number.

6648692489 is a deficient number, since it is larger than the sum of its proper divisors (1).

6648692489 is an equidigital number, since it uses as much as digits as its factorization.

6648692489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35831808, while the sum is 62.

The square root of 6648692489 is about 81539.5148930873. The cubic root of 6648692489 is about 1880.3791004961.

The spelling of 6648692489 in words is "six billion, six hundred forty-eight million, six hundred ninety-two thousand, four hundred eighty-nine".