9966966 has 8 divisors (see below), whose sum is σ = 19933944. Its totient is φ = 3322320.

The previous prime is 9966941. The next prime is 9966967. The reversal of 9966966 is 6696699.

It is a sphenic number, since it is the product of 3 distinct primes.

9966966 is an admirable number.

It is a super-2 number, since 2×9966966² = 198680822490312, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9966967) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 830575 + ... + 830586.

It is an arithmetic number, because the mean of its divisors is an integer number (2491743).

Almost surely, 2^9966966 is an apocalyptic number.

9966966 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9966966 is a wasteful number, since it uses less digits than its factorization.

9966966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1661166.

The product of its digits is 944784, while the sum is 51.

The square root of 9966966 is about 3157.0502054925. The cubic root of 9966966 is about 215.2059753135.

The spelling of 9966966 in words is "nine million, nine hundred sixty-six thousand, nine hundred sixty-six".