766625969 has 2 divisors, whose sum is σ = 766625970. Its totient is φ = 766625968.

The previous prime is 766625947. The next prime is 766626023. The reversal of 766625969 is 969526667.

766625969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 766625344 + 625 = 27688^2 + 25^2 .

It is an emirp because it is prime and its reverse (969526667) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-766625969 is a prime.

It is a super-2 number, since 2×766625969² = 1175430752690377922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (766625869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383312984 + 383312985.

It is an arithmetic number, because the mean of its divisors is an integer number (383312985).

Almost surely, 2^766625969 is an apocalyptic number.

It is an amenable number.

766625969 is a deficient number, since it is larger than the sum of its proper divisors (1).

766625969 is an equidigital number, since it uses as much as digits as its factorization.

766625969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7348320, while the sum is 56.

The square root of 766625969 is about 27688.0112864756. The cubic root of 766625969 is about 915.2249316124.

The spelling of 766625969 in words is "seven hundred sixty-six million, six hundred twenty-five thousand, nine hundred sixty-nine".