9660796921 has 4 divisors (see below), whose sum is σ = 9662194512. Its totient is φ = 9659399332.

The previous prime is 9660796919. The next prime is 9660796931. The reversal of 9660796921 is 1296970669.

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.

It is a cyclic number.

It is not a de Polignac number, because 9660796921 - 2¹ = 9660796919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9660796931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 688375 + ... + 702268.

It is an arithmetic number, because the mean of its divisors is an integer number (2415548628).

Almost surely, 2^9660796921 is an apocalyptic number.

It is an amenable number.

9660796921 is a deficient number, since it is larger than the sum of its proper divisors (1397591).

9660796921 is a wasteful number, since it uses less digits than its factorization.

9660796921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397590.

The product of its (nonzero) digits is 2204496, while the sum is 55.

The square root of 9660796921 is about 98289.3530398893. The cubic root of 9660796921 is about 2129.7942538231.

The spelling of 9660796921 in words is "nine billion, six hundred sixty million, seven hundred ninety-six thousand, nine hundred twenty-one".