720755663 has 2 divisors, whose sum is σ = 720755664. Its totient is φ = 720755662.

The previous prime is 720755657. The next prime is 720755677. The reversal of 720755663 is 366557027.

It is a weak prime.

It is an emirp because it is prime and its reverse (366557027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 720755663 - 2¹⁶ = 720690127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 720755663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720755603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360377831 + 360377832.

It is an arithmetic number, because the mean of its divisors is an integer number (360377832).

Almost surely, 2^720755663 is an apocalyptic number.

720755663 is a deficient number, since it is larger than the sum of its proper divisors (1).

720755663 is an equidigital number, since it uses as much as digits as its factorization.

720755663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 264600, while the sum is 41.

The square root of 720755663 is about 26846.8929859677. The cubic root of 720755663 is about 896.5943981746.

The spelling of 720755663 in words is "seven hundred twenty million, seven hundred fifty-five thousand, six hundred sixty-three".