766073643161 has 2 divisors, whose sum is σ = 766073643162. Its totient is φ = 766073643160.

The previous prime is 766073643133. The next prime is 766073643241. The reversal of 766073643161 is 161346370667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 561368070025 + 204705573136 = 749245^2 + 452444^2 .

It is an emirp because it is prime and its reverse (161346370667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 766073643161 - 2¹⁰ = 766073642137 is a prime.

It is not a weakly prime, because it can be changed into another prime (766073643121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383036821580 + 383036821581.

It is an arithmetic number, because the mean of its divisors is an integer number (383036821581).

Almost surely, 2^766073643161 is an apocalyptic number.

It is an amenable number.

766073643161 is a deficient number, since it is larger than the sum of its proper divisors (1).

766073643161 is an equidigital number, since it uses as much as digits as its factorization.

766073643161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2286144, while the sum is 50.

The spelling of 766073643161 in words is "seven hundred sixty-six billion, seventy-three million, six hundred forty-three thousand, one hundred sixty-one".