766506757249 has 2 divisors, whose sum is σ = 766506757250. Its totient is φ = 766506757248.

The previous prime is 766506757229. The next prime is 766506757307. The reversal of 766506757249 is 942757605667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 419473838224 + 347032919025 = 647668^2 + 589095^2 .

It is a cyclic number.

It is not a de Polignac number, because 766506757249 - 2⁵ = 766506757217 is a prime.

It is not a weakly prime, because it can be changed into another prime (766506757229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383253378624 + 383253378625.

It is an arithmetic number, because the mean of its divisors is an integer number (383253378625).

Almost surely, 2^766506757249 is an apocalyptic number.

It is an amenable number.

766506757249 is a deficient number, since it is larger than the sum of its proper divisors (1).

766506757249 is an equidigital number, since it uses as much as digits as its factorization.

766506757249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 133358400, while the sum is 64.

The spelling of 766506757249 in words is "seven hundred sixty-six billion, five hundred six million, seven hundred fifty-seven thousand, two hundred forty-nine".