7766078651 has 2 divisors, whose sum is σ = 7766078652. Its totient is φ = 7766078650.

The previous prime is 7766078627. The next prime is 7766078653. The reversal of 7766078651 is 1568706677.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7766078651 is a prime.

It is a super-2 number, since 2×7766078651² (a number of 21 digits) contains 22 as substring.

Together with 7766078653, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 7766078593 and 7766078602.

It is not a weakly prime, because it can be changed into another prime (7766078653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3883039325 + 3883039326.

It is an arithmetic number, because the mean of its divisors is an integer number (3883039326).

Almost surely, 2^7766078651 is an apocalyptic number.

7766078651 is a deficient number, since it is larger than the sum of its proper divisors (1).

7766078651 is an equidigital number, since it uses as much as digits as its factorization.

7766078651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2963520, while the sum is 53.

The square root of 7766078651 is about 88125.3575936007. The cubic root of 7766078651 is about 1980.3134091344.

The spelling of 7766078651 in words is "seven billion, seven hundred sixty-six million, seventy-eight thousand, six hundred fifty-one".