768664619 has 2 divisors, whose sum is σ = 768664620. Its totient is φ = 768664618.

The previous prime is 768664601. The next prime is 768664643. The reversal of 768664619 is 916466867.

768664619 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-768664619 is a prime.

It is a super-2 number, since 2×768664619² = 1181690593004830322, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (768660619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384332309 + 384332310.

It is an arithmetic number, because the mean of its divisors is an integer number (384332310).

Almost surely, 2^768664619 is an apocalyptic number.

768664619 is a deficient number, since it is larger than the sum of its proper divisors (1).

768664619 is an equidigital number, since it uses as much as digits as its factorization.

768664619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 53.

The square root of 768664619 is about 27724.8015141678. The cubic root of 768664619 is about 916.0354841393.

The spelling of 768664619 in words is "seven hundred sixty-eight million, six hundred sixty-four thousand, six hundred nineteen".