9975555 has 20 divisors (see below), whose sum is σ = 17882832. Its totient is φ = 5320080.

The previous prime is 9975547. The next prime is 9975569. The reversal of 9975555 is 5555799.

9975555 is a `hidden beast` number, since 9 + 97 + 5 + 555 = 666.

It is not a de Polignac number, because 9975555 - 2³ = 9975547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 9975555.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11911 + ... + 12720.

Almost surely, 2^9975555 is an apocalyptic number.

9975555 is a deficient number, since it is larger than the sum of its proper divisors (7907277).

9975555 is a wasteful number, since it uses less digits than its factorization.

9975555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24648 (or 24639 counting only the distinct ones).

The product of its digits is 354375, while the sum is 45.

The square root of 9975555 is about 3158.4102013513. The cubic root of 9975555 is about 215.2677752442.

The spelling of 9975555 in words is "nine million, nine hundred seventy-five thousand, five hundred fifty-five".