9766507081 has 4 divisors (see below), whose sum is σ = 9974305152. Its totient is φ = 9558709012.

The previous prime is 9766507073. The next prime is 9766507097. The reversal of 9766507081 is 1807056679.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1807056679 = 251 ⋅7199429.

It is a cyclic number.

It is not a de Polignac number, because 9766507081 - 2³ = 9766507073 is a prime.

It is a super-2 number, since 2×9766507081² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9766507981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103898965 + ... + 103899058.

It is an arithmetic number, because the mean of its divisors is an integer number (2493576288).

Almost surely, 2^9766507081 is an apocalyptic number.

It is an amenable number.

9766507081 is a deficient number, since it is larger than the sum of its proper divisors (207798071).

9766507081 is a wasteful number, since it uses less digits than its factorization.

9766507081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207798070.

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 9766507081 is about 98825.6397955510. The cubic root of 9766507081 is about 2137.5342871328.

The spelling of 9766507081 in words is "nine billion, seven hundred sixty-six million, five hundred seven thousand, eighty-one".