9917966 has 4 divisors (see below), whose sum is σ = 14876952. Its totient is φ = 4958982.

The previous prime is 9917939. The next prime is 9917969. The reversal of 9917966 is 6697199.

It is a happy number.

9917966 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 9917966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9917969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2479490 + ... + 2479493.

It is an arithmetic number, because the mean of its divisors is an integer number (3719238).

Almost surely, 2^9917966 is an apocalyptic number.

9917966 is a deficient number, since it is larger than the sum of its proper divisors (4958986).

9917966 is a wasteful number, since it uses less digits than its factorization.

9917966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4958985.

The product of its digits is 183708, while the sum is 47.

The square root of 9917966 is about 3149.2802352284. The cubic root of 9917966 is about 214.8527276993.

The spelling of 9917966 in words is "nine million, nine hundred seventeen thousand, nine hundred sixty-six".