9906661473 has 16 divisors (see below), whose sum is σ = 13658988096. Its totient is φ = 6383108160.

The previous prime is 9906661421. The next prime is 9906661519. The reversal of 9906661473 is 3741666099.

9906661473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9906661473 - 2⁸ = 9906661217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9906661403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 454318 + ... + 475623.

It is an arithmetic number, because the mean of its divisors is an integer number (853686756).

Almost surely, 2^9906661473 is an apocalyptic number.

It is an amenable number.

9906661473 is a deficient number, since it is larger than the sum of its proper divisors (3752326623).

9906661473 is a wasteful number, since it uses less digits than its factorization.

9906661473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930064.

The product of its (nonzero) digits is 1469664, while the sum is 51.

The square root of 9906661473 is about 99532.2132427487. The cubic root of 9906661473 is about 2147.7106674070.

The spelling of 9906661473 in words is "nine billion, nine hundred six million, six hundred sixty-one thousand, four hundred seventy-three".