9966158 has 4 divisors (see below), whose sum is σ = 14949240. Its totient is φ = 4983078.

The previous prime is 9966139. The next prime is 9966167. The reversal of 9966158 is 8516699.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8516699 = 241 ⋅35339.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2491538 + ... + 2491541.

It is an arithmetic number, because the mean of its divisors is an integer number (3737310).

Almost surely, 2^9966158 is an apocalyptic number.

9966158 is a deficient number, since it is larger than the sum of its proper divisors (4983082).

9966158 is a wasteful number, since it uses less digits than its factorization.

9966158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4983081.

The product of its digits is 116640, while the sum is 44.

The square root of 9966158 is about 3156.9222353425. The cubic root of 9966158 is about 215.2001597314.

The spelling of 9966158 in words is "nine million, nine hundred sixty-six thousand, one hundred fifty-eight".