766805253157 has 2 divisors, whose sum is σ = 766805253158. Its totient is φ = 766805253156.

The previous prime is 766805253083. The next prime is 766805253173. The reversal of 766805253157 is 751352508667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 737149313476 + 29655939681 = 858574^2 + 172209^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-766805253157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 766805253098 and 766805253107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (766805253187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383402626578 + 383402626579.

It is an arithmetic number, because the mean of its divisors is an integer number (383402626579).

Almost surely, 2^766805253157 is an apocalyptic number.

It is an amenable number.

766805253157 is a deficient number, since it is larger than the sum of its proper divisors (1).

766805253157 is an equidigital number, since it uses as much as digits as its factorization.

766805253157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584000, while the sum is 55.

The spelling of 766805253157 in words is "seven hundred sixty-six billion, eight hundred five million, two hundred fifty-three thousand, one hundred fifty-seven".