766475454761 has 2 divisors, whose sum is σ = 766475454762. Its totient is φ = 766475454760.

The previous prime is 766475454757. The next prime is 766475454763. The reversal of 766475454761 is 167454574667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 643614689536 + 122860765225 = 802256^2 + 350515^2 .

It is an emirp because it is prime and its reverse (167454574667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 766475454761 - 2² = 766475454757 is a prime.

Together with 766475454763, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 766475454694 and 766475454703.

It is not a weakly prime, because it can be changed into another prime (766475454763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383237727380 + 383237727381.

It is an arithmetic number, because the mean of its divisors is an integer number (383237727381).

Almost surely, 2^766475454761 is an apocalyptic number.

It is an amenable number.

766475454761 is a deficient number, since it is larger than the sum of its proper divisors (1).

766475454761 is an equidigital number, since it uses as much as digits as its factorization.

766475454761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 118540800, while the sum is 62.

The spelling of 766475454761 in words is "seven hundred sixty-six billion, four hundred seventy-five million, four hundred fifty-four thousand, seven hundred sixty-one".