6641415689 has 2 divisors, whose sum is σ = 6641415690. Its totient is φ = 6641415688.

The previous prime is 6641415617. The next prime is 6641415701. The reversal of 6641415689 is 9865141466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6134805625 + 506610064 = 78325^2 + 22508^2 .

It is a cyclic number.

It is not a de Polignac number, because 6641415689 - 2²⁴ = 6624638473 is a prime.

It is not a weakly prime, because it can be changed into another prime (6646415689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3320707844 + 3320707845.

It is an arithmetic number, because the mean of its divisors is an integer number (3320707845).

Almost surely, 2^6641415689 is an apocalyptic number.

It is an amenable number.

6641415689 is a deficient number, since it is larger than the sum of its proper divisors (1).

6641415689 is an equidigital number, since it uses as much as digits as its factorization.

6641415689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 50.

The square root of 6641415689 is about 81494.8813668687. The cubic root of 6641415689 is about 1879.6928433796.

The spelling of 6641415689 in words is "six billion, six hundred forty-one million, four hundred fifteen thousand, six hundred eighty-nine".