6699555 has 24 divisors (see below), whose sum is σ = 12119328. Its totient is φ = 3417216.

The previous prime is 6699541. The next prime is 6699577. The reversal of 6699555 is 5559966.

6699555 is a `hidden beast` number, since 6 + 6 + 99 + 555 = 666.

It is not a de Polignac number, because 6699555 - 2⁶ = 6699491 is a prime.

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

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 6699555.

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 23 ways as a sum of consecutive naturals, for example, 2202 + ... + 4271.

It is an arithmetic number, because the mean of its divisors is an integer number (504972).

Almost surely, 2^6699555 is an apocalyptic number.

6699555 is a deficient number, since it is larger than the sum of its proper divisors (5419773).

6699555 is a wasteful number, since it uses less digits than its factorization.

6699555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6507 (or 6504 counting only the distinct ones).

The product of its digits is 364500, while the sum is 45.

The square root of 6699555 is about 2588.3498604323. The cubic root of 6699555 is about 188.5161893002.

The spelling of 6699555 in words is "six million, six hundred ninety-nine thousand, five hundred fifty-five".