720666348679 has 2 divisors, whose sum is σ = 720666348680. Its totient is φ = 720666348678.

The previous prime is 720666348631. The next prime is 720666348767. The reversal of 720666348679 is 976843666027.

It is a weak prime.

It is an emirp because it is prime and its reverse (976843666027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 720666348679 - 2⁷ = 720666348551 is a prime.

It is a super-2 number, since 2×720666348679² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 720666348679.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720666349679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360333174339 + 360333174340.

It is an arithmetic number, because the mean of its divisors is an integer number (360333174340).

Almost surely, 2^720666348679 is an apocalyptic number.

720666348679 is a deficient number, since it is larger than the sum of its proper divisors (1).

720666348679 is an equidigital number, since it uses as much as digits as its factorization.

720666348679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109734912, while the sum is 64.

The spelling of 720666348679 in words is "seven hundred twenty billion, six hundred sixty-six million, three hundred forty-eight thousand, six hundred seventy-nine".