6641061613 has 2 divisors, whose sum is σ = 6641061614. Its totient is φ = 6641061612.

The previous prime is 6641061571. The next prime is 6641061629. The reversal of 6641061613 is 3161601466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6636057444 + 5004169 = 81462^2 + 2237^2 .

It is a cyclic number.

It is not a de Polignac number, because 6641061613 - 2¹³ = 6641053421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6641061313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3320530806 + 3320530807.

It is an arithmetic number, because the mean of its divisors is an integer number (3320530807).

Almost surely, 2^6641061613 is an apocalyptic number.

It is an amenable number.

6641061613 is a deficient number, since it is larger than the sum of its proper divisors (1).

6641061613 is an equidigital number, since it uses as much as digits as its factorization.

6641061613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 6641061613 is about 81492.7089560778. The cubic root of 6641061613 is about 1879.6594385563.

The spelling of 6641061613 in words is "six billion, six hundred forty-one million, sixty-one thousand, six hundred thirteen".