766079681 has 2 divisors, whose sum is σ = 766079682. Its totient is φ = 766079680.

The previous prime is 766079603. The next prime is 766079683. The reversal of 766079681 is 186970667.

766079681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 597313600 + 168766081 = 24440^2 + 12991^2 .

It is a cyclic number.

It is not a de Polignac number, because 766079681 - 2¹⁰ = 766078657 is a prime.

It is a super-2 number, since 2×766079681² = 1173756155282123522, which contains 22 as substring.

Together with 766079683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (766079683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383039840 + 383039841.

It is an arithmetic number, because the mean of its divisors is an integer number (383039841).

Almost surely, 2^766079681 is an apocalyptic number.

It is an amenable number.

766079681 is a deficient number, since it is larger than the sum of its proper divisors (1).

766079681 is an equidigital number, since it uses as much as digits as its factorization.

766079681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 766079681 is about 27678.1444645410. The cubic root of 766079681 is about 915.0074873724.

The spelling of 766079681 in words is "seven hundred sixty-six million, seventy-nine thousand, six hundred eighty-one".