765770081 has 2 divisors, whose sum is σ = 765770082. Its totient is φ = 765770080.

The previous prime is 765770059. The next prime is 765770087. The reversal of 765770081 is 180077567.

765770081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 739350481 + 26419600 = 27191^2 + 5140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-765770081 is a prime.

It is a super-2 number, since 2×765770081² = 1172807633909493122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (765770087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382885040 + 382885041.

It is an arithmetic number, because the mean of its divisors is an integer number (382885041).

Almost surely, 2^765770081 is an apocalyptic number.

It is an amenable number.

765770081 is a deficient number, since it is larger than the sum of its proper divisors (1).

765770081 is an equidigital number, since it uses as much as digits as its factorization.

765770081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82320, while the sum is 41.

The square root of 765770081 is about 27672.5510388905. The cubic root of 765770081 is about 914.8842084256.

The spelling of 765770081 in words is "seven hundred sixty-five million, seven hundred seventy thousand, eighty-one".