9661216 has 12 divisors (see below), whose sum is σ = 19020582. Its totient is φ = 4830592.

The previous prime is 9661207. The next prime is 9661231. The reversal of 9661216 is 6121669.

It can be written as a sum of positive squares in only one way, i.e., 5740816 + 3920400 = 2396^2 + 1980^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 150925 + ... + 150988.

Almost surely, 2^9661216 is an apocalyptic number.

It is an amenable number.

9661216 is a deficient number, since it is larger than the sum of its proper divisors (9359366).

9661216 is a wasteful number, since it uses less digits than its factorization.

9661216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301923 (or 301915 counting only the distinct ones).

The product of its digits is 3888, while the sum is 31.

The square root of 9661216 is about 3108.2496682217. The cubic root of 9661216 is about 212.9825049735.

The spelling of 9661216 in words is "nine million, six hundred sixty-one thousand, two hundred sixteen".