9950661001 has 4 divisors (see below), whose sum is σ = 9967907092. Its totient is φ = 9933414912.

The previous prime is 9950660999. The next prime is 9950661031. The reversal of 9950661001 is 1001660599.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7977169225 + 1973491776 = 89315^2 + 44424^2 .

It is a cyclic number.

It is not a de Polignac number, because 9950661001 - 2¹ = 9950660999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9950661031) 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 3 ways as a sum of consecutive naturals, for example, 8622180 + ... + 8623333.

It is an arithmetic number, because the mean of its divisors is an integer number (2491976773).

Almost surely, 2^9950661001 is an apocalyptic number.

It is an amenable number.

9950661001 is a deficient number, since it is larger than the sum of its proper divisors (17246091).

9950661001 is a wasteful number, since it uses less digits than its factorization.

9950661001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17246090.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 9950661001 is about 99752.9999599010. Note that the first 4 decimals coincide. The cubic root of 9950661001 is about 2150.8855916169.

The spelling of 9950661001 in words is "nine billion, nine hundred fifty million, six hundred sixty-one thousand, one".