718661422727 has 2 divisors, whose sum is σ = 718661422728. Its totient is φ = 718661422726.

The previous prime is 718661422723. The next prime is 718661422741. The reversal of 718661422727 is 727224166817.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 718661422727 - 2² = 718661422723 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (718661422723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359330711363 + 359330711364.

It is an arithmetic number, because the mean of its divisors is an integer number (359330711364).

Almost surely, 2^718661422727 is an apocalyptic number.

718661422727 is a deficient number, since it is larger than the sum of its proper divisors (1).

718661422727 is an equidigital number, since it uses as much as digits as its factorization.

718661422727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3161088, while the sum is 53.

The spelling of 718661422727 in words is "seven hundred eighteen billion, six hundred sixty-one million, four hundred twenty-two thousand, seven hundred twenty-seven".