6689551149 has 12 divisors (see below), whose sum is σ = 9806905056. Its totient is φ = 4393137672.

The previous prime is 6689551129. The next prime is 6689551159. The reversal of 6689551149 is 9411559866.

6689551149 is a `hidden beast` number, since 6 + 6 + 89 + 5 + 511 + 49 = 666.

It is not a de Polignac number, because 6689551149 - 2⁵ = 6689551117 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6689551095 and 6689551104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6689551129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5546289 + ... + 5547494.

It is an arithmetic number, because the mean of its divisors is an integer number (817242088).

Almost surely, 2^6689551149 is an apocalyptic number.

It is an amenable number.

6689551149 is a deficient number, since it is larger than the sum of its proper divisors (3117353907).

6689551149 is a wasteful number, since it uses less digits than its factorization.

6689551149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11093856 (or 11093853 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 54.

The square root of 6689551149 is about 81789.6762984180. The cubic root of 6689551149 is about 1884.2231105876.

The spelling of 6689551149 in words is "six billion, six hundred eighty-nine million, five hundred fifty-one thousand, one hundred forty-nine".