9996921065 has 8 divisors (see below), whose sum is σ = 11999232648. Its totient is φ = 7995585280.

The previous prime is 9996921061. The next prime is 9996921071. The reversal of 9996921065 is 5601296999.

It can be written as a sum of positive squares in 4 ways, for example, as 505485289 + 9491435776 = 22483^2 + 97424^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9996921065 - 2² = 9996921061 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9996921065.

It is not an unprimeable number, because it can be changed into a prime (9996921061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221216 + ... + 262545.

It is an arithmetic number, because the mean of its divisors is an integer number (1499904081).

Almost surely, 2^9996921065 is an apocalyptic number.

It is an amenable number.

9996921065 is a deficient number, since it is larger than the sum of its proper divisors (2002311583).

9996921065 is a wasteful number, since it uses less digits than its factorization.

9996921065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487899.

The product of its (nonzero) digits is 2361960, while the sum is 56.

The square root of 9996921065 is about 99984.6041398374. The cubic root of 9996921065 is about 2154.2135551893.

The spelling of 9996921065 in words is "nine billion, nine hundred ninety-six million, nine hundred twenty-one thousand, sixty-five".