9971566 has 16 divisors (see below), whose sum is σ = 16385328. Its totient is φ = 4513600.

The previous prime is 9971551. The next prime is 9971597. The reversal of 9971566 is 6651799.

9971566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5376 + ... + 6988.

It is an arithmetic number, because the mean of its divisors is an integer number (1024083).

Almost surely, 2^9971566 is an apocalyptic number.

9971566 is a deficient number, since it is larger than the sum of its proper divisors (6413762).

9971566 is a wasteful number, since it uses less digits than its factorization.

9971566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907.

The product of its digits is 102060, while the sum is 43.

The square root of 9971566 is about 3157.7786496206. The cubic root of 9971566 is about 215.2390778387.

The spelling of 9971566 in words is "nine million, nine hundred seventy-one thousand, five hundred sixty-six".