6691024489 has 2 divisors, whose sum is σ = 6691024490. Its totient is φ = 6691024488.

The previous prime is 6691024429. The next prime is 6691024597. The reversal of 6691024489 is 9844201966.

6691024489 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., 5788622889 + 902401600 = 76083^2 + 30040^2 .

It is a cyclic number.

It is not a de Polignac number, because 6691024489 - 2²¹ = 6688927337 is a prime.

It is a super-2 number, since 2×6691024489² = 89539617424795422242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6691024429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3345512244 + 3345512245.

It is an arithmetic number, because the mean of its divisors is an integer number (3345512245).

Almost surely, 2^6691024489 is an apocalyptic number.

It is an amenable number.

6691024489 is a deficient number, since it is larger than the sum of its proper divisors (1).

6691024489 is an equidigital number, since it uses as much as digits as its factorization.

6691024489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 6691024489 is about 81798.6826849919. The cubic root of 6691024489 is about 1884.3614306549.

The spelling of 6691024489 in words is "six billion, six hundred ninety-one million, twenty-four thousand, four hundred eighty-nine".