7656065281 has 2 divisors, whose sum is σ = 7656065282. Its totient is φ = 7656065280.

The previous prime is 7656065267. The next prime is 7656065297. The reversal of 7656065281 is 1825606567.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7252055281 + 404010000 = 85159^2 + 20100^2 .

It is an emirp because it is prime and its reverse (1825606567) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7656065281 is a prime.

It is a super-2 number, since 2×7656065281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7656065231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3828032640 + 3828032641.

It is an arithmetic number, because the mean of its divisors is an integer number (3828032641).

Almost surely, 2^7656065281 is an apocalyptic number.

It is an amenable number.

7656065281 is a deficient number, since it is larger than the sum of its proper divisors (1).

7656065281 is an equidigital number, since it uses as much as digits as its factorization.

7656065281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 604800, while the sum is 46.

The square root of 7656065281 is about 87498.9444564904. The cubic root of 7656065281 is about 1970.9179400292.

The spelling of 7656065281 in words is "seven billion, six hundred fifty-six million, sixty-five thousand, two hundred eighty-one".