766528769 has 2 divisors, whose sum is σ = 766528770. Its totient is φ = 766528768.

The previous prime is 766528757. The next prime is 766528811. The reversal of 766528769 is 967825667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 681888769 + 84640000 = 26113^2 + 9200^2 .

It is a cyclic number.

It is not a de Polignac number, because 766528769 - 2⁴ = 766528753 is a prime.

It is a super-2 number, since 2×766528769² = 1175132707409310722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (766528739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383264384 + 383264385.

It is an arithmetic number, because the mean of its divisors is an integer number (383264385).

Almost surely, 2^766528769 is an apocalyptic number.

It is an amenable number.

766528769 is a deficient number, since it is larger than the sum of its proper divisors (1).

766528769 is an equidigital number, since it uses as much as digits as its factorization.

766528769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7620480, while the sum is 56.

The square root of 766528769 is about 27686.2559585076. The cubic root of 766528769 is about 915.1862497227.

The spelling of 766528769 in words is "seven hundred sixty-six million, five hundred twenty-eight thousand, seven hundred sixty-nine".