766776713 has 4 divisors (see below), whose sum is σ = 767038980. Its totient is φ = 766514448.

The previous prime is 766776709. The next prime is 766776727. The reversal of 766776713 is 317677667.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 124255609 + 642521104 = 11147^2 + 25348^2 .

It is a cyclic number.

It is not a de Polignac number, because 766776713 - 2² = 766776709 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (766776113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126698 + ... + 132611.

It is an arithmetic number, because the mean of its divisors is an integer number (191759745).

Almost surely, 2^766776713 is an apocalyptic number.

It is an amenable number.

766776713 is a deficient number, since it is larger than the sum of its proper divisors (262267).

766776713 is a wasteful number, since it uses less digits than its factorization.

766776713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262266.

The product of its digits is 1555848, while the sum is 50.

The square root of 766776713 is about 27690.7333416795. The cubic root of 766776713 is about 915.2849155032.

The spelling of 766776713 in words is "seven hundred sixty-six million, seven hundred seventy-six thousand, seven hundred thirteen".