6775577649 has 12 divisors (see below), whose sum is σ = 9823331700. Its totient is φ = 4500258144.

The previous prime is 6775577609. The next prime is 6775577689. The reversal of 6775577649 is 9467755776.

6775577649 is a `hidden beast` number, since 6 + 7 + 7 + 557 + 76 + 4 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (6775577609) and next prime (6775577689).

It can be written as a sum of positive squares in 2 ways, for example, as 578739249 + 6196838400 = 24057^2 + 78720^2 .

It is not a de Polignac number, because 6775577649 - 2¹⁹ = 6775053361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6775577609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1396914 + ... + 1401755.

It is an arithmetic number, because the mean of its divisors is an integer number (818610975).

Almost surely, 2^6775577649 is an apocalyptic number.

It is an amenable number.

6775577649 is a deficient number, since it is larger than the sum of its proper divisors (3047754051).

6775577649 is a wasteful number, since it uses less digits than its factorization.

6775577649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2798944 (or 2798941 counting only the distinct ones).

The product of its digits is 77792400, while the sum is 63.

The square root of 6775577649 is about 82313.8970587592. The cubic root of 6775577649 is about 1892.2656637034.

The spelling of 6775577649 in words is "six billion, seven hundred seventy-five million, five hundred seventy-seven thousand, six hundred forty-nine".