9966166 has 16 divisors (see below), whose sum is σ = 17303040. Its totient is φ = 4216680.

The previous prime is 9966139. The next prime is 9966167. The reversal of 9966166 is 6616699.

9966166 = T₇₆ + T₇₇ + ... + T₃₉₁.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9966167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3400 + ... + 5611.

It is an arithmetic number, because the mean of its divisors is an integer number (1081440).

Almost surely, 2^9966166 is an apocalyptic number.

9966166 is a deficient number, since it is larger than the sum of its proper divisors (7336874).

9966166 is a wasteful number, since it uses less digits than its factorization.

9966166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9099.

The product of its digits is 104976, while the sum is 43.

The square root of 9966166 is about 3156.9235023991. The cubic root of 9966166 is about 215.2002173130.

The spelling of 9966166 in words is "nine million, nine hundred sixty-six thousand, one hundred sixty-six".