6641516099 has 2 divisors, whose sum is σ = 6641516100. Its totient is φ = 6641516098.

The previous prime is 6641516081. The next prime is 6641516107. The reversal of 6641516099 is 9906151466.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6641516099 - 2⁸ = 6641515843 is a prime.

It is not a weakly prime, because it can be changed into another prime (6641516699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3320758049 + 3320758050.

It is an arithmetic number, because the mean of its divisors is an integer number (3320758050).

Almost surely, 2^6641516099 is an apocalyptic number.

6641516099 is a deficient number, since it is larger than the sum of its proper divisors (1).

6641516099 is an equidigital number, since it uses as much as digits as its factorization.

6641516099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 6641516099 is about 81495.4974155014. The cubic root of 6641516099 is about 1879.7023162097.

The spelling of 6641516099 in words is "six billion, six hundred forty-one million, five hundred sixteen thousand, ninety-nine".