6640411601 has 2 divisors, whose sum is σ = 6640411602. Its totient is φ = 6640411600.

The previous prime is 6640411579. The next prime is 6640411681. The reversal of 6640411601 is 1061140466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3936307600 + 2704104001 = 62740^2 + 52001^2 .

It is a cyclic number.

It is not a de Polignac number, because 6640411601 - 2³⁰ = 5566669777 is a prime.

It is not a weakly prime, because it can be changed into another prime (6640411681) 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, 3320205800 + 3320205801.

It is an arithmetic number, because the mean of its divisors is an integer number (3320205801).

Almost surely, 2^6640411601 is an apocalyptic number.

It is an amenable number.

6640411601 is a deficient number, since it is larger than the sum of its proper divisors (1).

6640411601 is an equidigital number, since it uses as much as digits as its factorization.

6640411601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 6640411601 is about 81488.7206980205. The cubic root of 6640411601 is about 1879.5981109591.

The spelling of 6640411601 in words is "six billion, six hundred forty million, four hundred eleven thousand, six hundred one".