6641434997 has 2 divisors, whose sum is σ = 6641434998. Its totient is φ = 6641434996.

The previous prime is 6641434981. The next prime is 6641435027. The reversal of 6641434997 is 7994341466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4336090801 + 2305344196 = 65849^2 + 48014^2 .

It is a cyclic number.

It is not a de Polignac number, because 6641434997 - 2⁴ = 6641434981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6641434937) 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, 3320717498 + 3320717499.

It is an arithmetic number, because the mean of its divisors is an integer number (3320717499).

Almost surely, 2^6641434997 is an apocalyptic number.

It is an amenable number.

6641434997 is a deficient number, since it is larger than the sum of its proper divisors (1).

6641434997 is an equidigital number, since it uses as much as digits as its factorization.

6641434997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3919104, while the sum is 53.

The square root of 6641434997 is about 81494.9998282103. Note that the first 3 decimals coincide. The cubic root of 6641434997 is about 1879.6946649327.

The spelling of 6641434997 in words is "six billion, six hundred forty-one million, four hundred thirty-four thousand, nine hundred ninety-seven".