1156666667449 has 2 divisors, whose sum is σ = 1156666667450. Its totient is φ = 1156666667448.

The previous prime is 1156666667447. The next prime is 1156666667483. The reversal of 1156666667449 is 9447666666511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 964707018025 + 191959649424 = 982195^2 + 438132^2 .

It is a cyclic number.

It is not a de Polignac number, because 1156666667449 - 2¹ = 1156666667447 is a prime.

Together with 1156666667447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1156666667447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578333333724 + 578333333725.

It is an arithmetic number, because the mean of its divisors is an integer number (578333333725).

Almost surely, 2^{1156666667449} is an apocalyptic number.

It is an amenable number.

1156666667449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156666667449 is an equidigital number, since it uses as much as digits as its factorization.

1156666667449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 235146240, while the sum is 67.

The spelling of 1156666667449 in words is "one trillion, one hundred fifty-six billion, six hundred sixty-six million, six hundred sixty-seven thousand, four hundred forty-nine".