7656991207 has 2 divisors, whose sum is σ = 7656991208. Its totient is φ = 7656991206.

The previous prime is 7656991193. The next prime is 7656991213. The reversal of 7656991207 is 7021996567.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7656991207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7656991297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3828495603 + 3828495604.

It is an arithmetic number, because the mean of its divisors is an integer number (3828495604).

Almost surely, 2^7656991207 is an apocalyptic number.

7656991207 is a deficient number, since it is larger than the sum of its proper divisors (1).

7656991207 is an equidigital number, since it uses as much as digits as its factorization.

7656991207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1428840, while the sum is 52.

The square root of 7656991207 is about 87504.2353660667. The cubic root of 7656991207 is about 1970.9973912240.

The spelling of 7656991207 in words is "seven billion, six hundred fifty-six million, nine hundred ninety-one thousand, two hundred seven".