9665976971 has 16 divisors (see below), whose sum is σ = 11217662976. Its totient is φ = 8157131136.

The previous prime is 9665976937. The next prime is 9665977001. The reversal of 9665976971 is 1796795669.

It is not a de Polignac number, because 9665976971 - 2²² = 9661782667 is a prime.

It is a super-2 number, since 2×9665976971² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9665976898 and 9665976907.

It is not an unprimeable number, because it can be changed into a prime (9665976911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1129310 + ... + 1137836.

It is an arithmetic number, because the mean of its divisors is an integer number (701103936).

Almost surely, 2^9665976971 is an apocalyptic number.

9665976971 is a deficient number, since it is larger than the sum of its proper divisors (1551686005).

9665976971 is a wasteful number, since it uses less digits than its factorization.

9665976971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11018.

The product of its digits is 38578680, while the sum is 65.

The square root of 9665976971 is about 98315.7005315021. The cubic root of 9665976971 is about 2130.1748459407.

The spelling of 9665976971 in words is "nine billion, six hundred sixty-five million, nine hundred seventy-six thousand, nine hundred seventy-one".