1223445666727 has 2 divisors, whose sum is σ = 1223445666728. Its totient is φ = 1223445666726.

The previous prime is 1223445666697. The next prime is 1223445666791. The reversal of 1223445666727 is 7276665443221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223445666727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223445636727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611722833363 + 611722833364.

It is an arithmetic number, because the mean of its divisors is an integer number (611722833364).

Almost surely, 2^{1223445666727} is an apocalyptic number.

1223445666727 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223445666727 is an equidigital number, since it uses as much as digits as its factorization.

1223445666727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20321280, while the sum is 55.

The spelling of 1223445666727 in words is "one trillion, two hundred twenty-three billion, four hundred forty-five million, six hundred sixty-six thousand, seven hundred twenty-seven".