9766360781 has 2 divisors, whose sum is σ = 9766360782. Its totient is φ = 9766360780.

The previous prime is 9766360777. The next prime is 9766360783. The reversal of 9766360781 is 1870636679.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8890792681 + 875568100 = 94291^2 + 29590^2 .

It is an emirp because it is prime and its reverse (1870636679) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9766360781 - 2² = 9766360777 is a prime.

It is a super-2 number, since 2×9766360781² (a number of 21 digits) contains 22 as substring.

Together with 9766360783, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9766360783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4883180390 + 4883180391.

It is an arithmetic number, because the mean of its divisors is an integer number (4883180391).

Almost surely, 2^9766360781 is an apocalyptic number.

It is an amenable number.

9766360781 is a deficient number, since it is larger than the sum of its proper divisors (1).

9766360781 is an equidigital number, since it uses as much as digits as its factorization.

9766360781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2286144, while the sum is 53.

The square root of 9766360781 is about 98824.8996002526. The cubic root of 9766360781 is about 2137.5236138244.

The spelling of 9766360781 in words is "nine billion, seven hundred sixty-six million, three hundred sixty thousand, seven hundred eighty-one".