9986655 has 16 divisors (see below), whose sum is σ = 18261504. Its totient is φ = 4565280.

The previous prime is 9986653. The next prime is 9986659. The reversal of 9986655 is 5566899.

9986655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9986655 - 2¹ = 9986653 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9986651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47451 + ... + 47660.

It is an arithmetic number, because the mean of its divisors is an integer number (1141344).

Almost surely, 2^9986655 is an apocalyptic number.

9986655 is a deficient number, since it is larger than the sum of its proper divisors (8274849).

9986655 is a wasteful number, since it uses less digits than its factorization.

9986655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95126.

The product of its digits is 583200, while the sum is 48.

The square root of 9986655 is about 3160.1669259708. The cubic root of 9986655 is about 215.3475899039.

The spelling of 9986655 in words is "nine million, nine hundred eighty-six thousand, six hundred fifty-five".