766765061 has 2 divisors, whose sum is σ = 766765062. Its totient is φ = 766765060.

The previous prime is 766765057. The next prime is 766765117. The reversal of 766765061 is 160567667.

766765061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 538936225 + 227828836 = 23215^2 + 15094^2 .

It is a cyclic number.

It is not a de Polignac number, because 766765061 - 2² = 766765057 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (766765001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383382530 + 383382531.

It is an arithmetic number, because the mean of its divisors is an integer number (383382531).

Almost surely, 2^766765061 is an apocalyptic number.

It is an amenable number.

766765061 is a deficient number, since it is larger than the sum of its proper divisors (1).

766765061 is an equidigital number, since it uses as much as digits as its factorization.

766765061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 44.

The square root of 766765061 is about 27690.5229455856. The cubic root of 766765061 is about 915.2802792322.

The spelling of 766765061 in words is "seven hundred sixty-six million, seven hundred sixty-five thousand, sixty-one".