6641061571 has 2 divisors, whose sum is σ = 6641061572. Its totient is φ = 6641061570.

The previous prime is 6641061563. The next prime is 6641061613. The reversal of 6641061571 is 1751601466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6641061571 - 2³ = 6641061563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6641061571.

It is not a weakly prime, because it can be changed into another prime (6641061071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3320530785 + 3320530786.

It is an arithmetic number, because the mean of its divisors is an integer number (3320530786).

Almost surely, 2^6641061571 is an apocalyptic number.

6641061571 is a deficient number, since it is larger than the sum of its proper divisors (1).

6641061571 is an equidigital number, since it uses as much as digits as its factorization.

6641061571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 6641061571 is about 81492.7086983860. The cubic root of 6641061571 is about 1879.6594345938.

The spelling of 6641061571 in words is "six billion, six hundred forty-one million, sixty-one thousand, five hundred seventy-one".