9967555 has 16 divisors (see below), whose sum is σ = 13033440. Its totient is φ = 7273728.

The previous prime is 9967549. The next prime is 9967597. The reversal of 9967555 is 5557699.

It is a cyclic number.

It is not a de Polignac number, because 9967555 - 2⁹ = 9967043 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4924 + ... + 6646.

It is an arithmetic number, because the mean of its divisors is an integer number (814590).

Almost surely, 2^9967555 is an apocalyptic number.

9967555 is a deficient number, since it is larger than the sum of its proper divisors (3065885).

9967555 is a wasteful number, since it uses less digits than its factorization.

9967555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830.

The product of its digits is 425250, while the sum is 46.

The square root of 9967555 is about 3157.1434873949. The cubic root of 9967555 is about 215.2102144445.

The spelling of 9967555 in words is "nine million, nine hundred sixty-seven thousand, five hundred fifty-five".