6664640410091 has 2 divisors, whose sum is σ = 6664640410092. Its totient is φ = 6664640410090.

The previous prime is 6664640410063. The next prime is 6664640410117. The reversal of 6664640410091 is 1900140464666.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6664640410091 is a prime.

It is not a weakly prime, because it can be changed into another prime (6664640410391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3332320205045 + 3332320205046.

It is an arithmetic number, because the mean of its divisors is an integer number (3332320205046).

Almost surely, 2^{6664640410091} is an apocalyptic number.

6664640410091 is a deficient number, since it is larger than the sum of its proper divisors (1).

6664640410091 is an equidigital number, since it uses as much as digits as its factorization.

6664640410091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 47.

The spelling of 6664640410091 in words is "six trillion, six hundred sixty-four billion, six hundred forty million, four hundred ten thousand, ninety-one".