9997660 has 12 divisors (see below), whose sum is σ = 20995128. Its totient is φ = 3999056.

The previous prime is 9997643. The next prime is 9997661. The reversal of 9997660 is 667999.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 9997660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9997661) 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, 249922 + ... + 249961.

It is an arithmetic number, because the mean of its divisors is an integer number (1749594).

Almost surely, 2^9997660 is an apocalyptic number.

It is an amenable number.

9997660 is an abundant number, since it is smaller than the sum of its proper divisors (10997468).

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

9997660 is a wasteful number, since it uses less digits than its factorization.

9997660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499892 (or 499890 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 46.

The square root of 9997660 is about 3161.9076520354. The cubic root of 9997660 is about 215.4266631017.

The spelling of 9997660 in words is "nine million, nine hundred ninety-seven thousand, six hundred sixty".