9665676657 has 36 divisors (see below), whose sum is σ = 17277858624. Its totient is φ = 5098373280.

The previous prime is 9665676649. The next prime is 9665676659. The reversal of 9665676657 is 7566765669.

It is a happy number.

9665676657 is a `hidden beast` number, since 9 + 6 + 6 + 567 + 6 + 65 + 7 = 666.

It is not a de Polignac number, because 9665676657 - 2³ = 9665676649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 9665676594 and 9665676603.

It is not an unprimeable number, because it can be changed into a prime (9665676659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 443269 + ... + 464562.

Almost surely, 2^9665676657 is an apocalyptic number.

It is an amenable number.

9665676657 is a deficient number, since it is larger than the sum of its proper divisors (7612181967).

9665676657 is a wasteful number, since it uses less digits than its factorization.

9665676657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907870 (or 907854 counting only the distinct ones).

The product of its digits is 85730400, while the sum is 63.

The square root of 9665676657 is about 98314.1732254307. The cubic root of 9665676657 is about 2130.1527847821.

The spelling of 9665676657 in words is "nine billion, six hundred sixty-five million, six hundred seventy-six thousand, six hundred fifty-seven".