7680709991 has 2 divisors, whose sum is σ = 7680709992. Its totient is φ = 7680709990.

The previous prime is 7680709963. The next prime is 7680709997. The reversal of 7680709991 is 1999070867.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7680709991 - 2¹⁸ = 7680447847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7680709997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3840354995 + 3840354996.

It is an arithmetic number, because the mean of its divisors is an integer number (3840354996).

Almost surely, 2^7680709991 is an apocalyptic number.

7680709991 is a deficient number, since it is larger than the sum of its proper divisors (1).

7680709991 is an equidigital number, since it uses as much as digits as its factorization.

7680709991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1714608, while the sum is 56.

The square root of 7680709991 is about 87639.6599206090. The cubic root of 7680709991 is about 1973.0304557985.

The spelling of 7680709991 in words is "seven billion, six hundred eighty million, seven hundred nine thousand, nine hundred ninety-one".