766929649 has 2 divisors, whose sum is σ = 766929650. Its totient is φ = 766929648.

The previous prime is 766929629. The next prime is 766929689. The reversal of 766929649 is 946929667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 565488400 + 201441249 = 23780^2 + 14193^2 .

It is an emirp because it is prime and its reverse (946929667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 766929649 - 2⁷ = 766929521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 766929593 and 766929602.

It is not a weakly prime, because it can be changed into another prime (766929629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383464824 + 383464825.

It is an arithmetic number, because the mean of its divisors is an integer number (383464825).

Almost surely, 2^766929649 is an apocalyptic number.

It is an amenable number.

766929649 is a deficient number, since it is larger than the sum of its proper divisors (1).

766929649 is an equidigital number, since it uses as much as digits as its factorization.

766929649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8817984, while the sum is 58.

The square root of 766929649 is about 27693.4947054358. The cubic root of 766929649 is about 915.3457635989.

The spelling of 766929649 in words is "seven hundred sixty-six million, nine hundred twenty-nine thousand, six hundred forty-nine".