6641014561 has 2 divisors, whose sum is σ = 6641014562. Its totient is φ = 6641014560.

The previous prime is 6641014559. The next prime is 6641014573. The reversal of 6641014561 is 1654101466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6300390625 + 340623936 = 79375^2 + 18456^2 .

It is a cyclic number.

It is not a de Polignac number, because 6641014561 - 2¹ = 6641014559 is a prime.

Together with 6641014559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6641014511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3320507280 + 3320507281.

It is an arithmetic number, because the mean of its divisors is an integer number (3320507281).

Almost surely, 2^6641014561 is an apocalyptic number.

It is an amenable number.

6641014561 is a deficient number, since it is larger than the sum of its proper divisors (1).

6641014561 is an equidigital number, since it uses as much as digits as its factorization.

6641014561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 6641014561 is about 81492.4202671635. The cubic root of 6641014561 is about 1879.6549994094.

The spelling of 6641014561 in words is "six billion, six hundred forty-one million, fourteen thousand, five hundred sixty-one".