6601200540491 has 2 divisors, whose sum is σ = 6601200540492. Its totient is φ = 6601200540490.

The previous prime is 6601200540449. The next prime is 6601200540643. The reversal of 6601200540491 is 1940450021066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6601200540491 - 2³⁰ = 6600126798667 is a prime.

It is not a weakly prime, because it can be changed into another prime (6601200540191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3300600270245 + 3300600270246.

It is an arithmetic number, because the mean of its divisors is an integer number (3300600270246).

Almost surely, 2^{6601200540491} is an apocalyptic number.

6601200540491 is a deficient number, since it is larger than the sum of its proper divisors (1).

6601200540491 is an equidigital number, since it uses as much as digits as its factorization.

6601200540491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 6601200540491 in words is "six trillion, six hundred one billion, two hundred million, five hundred forty thousand, four hundred ninety-one".