1155666223 has 2 divisors, whose sum is σ = 1155666224. Its totient is φ = 1155666222.

The previous prime is 1155666199. The next prime is 1155666293. The reversal of 1155666223 is 3226665511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1155666223 - 2⁹ = 1155665711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155666293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577833111 + 577833112.

It is an arithmetic number, because the mean of its divisors is an integer number (577833112).

Almost surely, 2^1155666223 is an apocalyptic number.

1155666223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155666223 is an equidigital number, since it uses as much as digits as its factorization.

1155666223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 37.

The square root of 1155666223 is about 33995.0911603425. The cubic root of 1155666223 is about 1049.4074428322.

The spelling of 1155666223 in words is "one billion, one hundred fifty-five million, six hundred sixty-six thousand, two hundred twenty-three".