766570861057 has 2 divisors, whose sum is σ = 766570861058. Its totient is φ = 766570861056.

The previous prime is 766570861051. The next prime is 766570861099. The reversal of 766570861057 is 750168075667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 693554174401 + 73016686656 = 832799^2 + 270216^2 .

It is an emirp because it is prime and its reverse (750168075667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 766570861057 - 2³⁵ = 732211122689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 766570860992 and 766570861010.

It is not a weakly prime, because it can be changed into another prime (766570861051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383285430528 + 383285430529.

It is an arithmetic number, because the mean of its divisors is an integer number (383285430529).

Almost surely, 2^766570861057 is an apocalyptic number.

It is an amenable number.

766570861057 is a deficient number, since it is larger than the sum of its proper divisors (1).

766570861057 is an equidigital number, since it uses as much as digits as its factorization.

766570861057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14817600, while the sum is 58.

The spelling of 766570861057 in words is "seven hundred sixty-six billion, five hundred seventy million, eight hundred sixty-one thousand, fifty-seven".