1116661005571 has 2 divisors, whose sum is σ = 1116661005572. Its totient is φ = 1116661005570.

The previous prime is 1116661005557. The next prime is 1116661005583. The reversal of 1116661005571 is 1755001666111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1116661005571 - 2⁷ = 1116661005443 is a prime.

It is not a weakly prime, because it can be changed into another prime (1116665005571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558330502785 + 558330502786.

It is an arithmetic number, because the mean of its divisors is an integer number (558330502786).

Almost surely, 2^{1116661005571} is an apocalyptic number.

1116661005571 is a deficient number, since it is larger than the sum of its proper divisors (1).

1116661005571 is an equidigital number, since it uses as much as digits as its factorization.

1116661005571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 40.

The spelling of 1116661005571 in words is "one trillion, one hundred sixteen billion, six hundred sixty-one million, five thousand, five hundred seventy-one".