720755677 has 2 divisors, whose sum is σ = 720755678. Its totient is φ = 720755676.

The previous prime is 720755663. The next prime is 720755689. The reversal of 720755677 is 776557027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 720707716 + 47961 = 26846^2 + 219^2 .

It is a cyclic number.

It is not a de Polignac number, because 720755677 - 2¹¹ = 720753629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720755657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360377838 + 360377839.

It is an arithmetic number, because the mean of its divisors is an integer number (360377839).

Almost surely, 2^720755677 is an apocalyptic number.

It is an amenable number.

720755677 is a deficient number, since it is larger than the sum of its proper divisors (1).

720755677 is an equidigital number, since it uses as much as digits as its factorization.

720755677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720300, while the sum is 46.

The square root of 720755677 is about 26846.8932467055. The cubic root of 720755677 is about 896.5944039798.

The spelling of 720755677 in words is "seven hundred twenty million, seven hundred fifty-five thousand, six hundred seventy-seven".