9997656 has 32 divisors (see below), whose sum is σ = 25407600. Its totient is φ = 3277440.

The previous prime is 9997643. The next prime is 9997661. The reversal of 9997656 is 6567999.

It is a junction number, because it is equal to n+sod(n) for n = 9997599 and 9997608.

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, 1951 + ... + 4878.

Almost surely, 2^9997656 is an apocalyptic number.

It is an amenable number.

9997656 is an abundant number, since it is smaller than the sum of its proper divisors (15409944).

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

9997656 is a wasteful number, since it uses less digits than its factorization.

9997656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6899 (or 6895 counting only the distinct ones).

The product of its digits is 918540, while the sum is 51.

The square root of 9997656 is about 3161.9070195058. The cubic root of 9997656 is about 215.4266343714.

The spelling of 9997656 in words is "nine million, nine hundred ninety-seven thousand, six hundred fifty-six".