9890066 has 4 divisors (see below), whose sum is σ = 14835102. Its totient is φ = 4945032.

The previous prime is 9890057. The next prime is 9890077. The reversal of 9890066 is 6600989.

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

It can be written as a sum of positive squares in only one way, i.e., 8579041 + 1311025 = 2929^2 + 1145^2 .

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2472515 + ... + 2472518.

Almost surely, 2^9890066 is an apocalyptic number.

9890066 is a deficient number, since it is larger than the sum of its proper divisors (4945036).

9890066 is a wasteful number, since it uses less digits than its factorization.

9890066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4945035.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 9890066 is about 3144.8475320753. The cubic root of 9890066 is about 214.6510727499.

The spelling of 9890066 in words is "nine million, eight hundred ninety thousand, sixty-six".