6740678449 has 4 divisors (see below), whose sum is σ = 7137188964. Its totient is φ = 6344167936.

The previous prime is 6740678437. The next prime is 6740678459. The reversal of 6740678449 is 9448760476.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1904449600 + 4836228849 = 43640^2 + 69543^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6740678449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6740678449.

It is not an unprimeable number, because it can be changed into a prime (6740678429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198255232 + ... + 198255265.

It is an arithmetic number, because the mean of its divisors is an integer number (1784297241).

Almost surely, 2^6740678449 is an apocalyptic number.

It is an amenable number.

6740678449 is a deficient number, since it is larger than the sum of its proper divisors (396510515).

6740678449 is a wasteful number, since it uses less digits than its factorization.

6740678449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396510514.

The product of its (nonzero) digits is 8128512, while the sum is 55.

The square root of 6740678449 is about 82101.6348740998. The cubic root of 6740678449 is about 1889.0112171604.

The spelling of 6740678449 in words is "six billion, seven hundred forty million, six hundred seventy-eight thousand, four hundred forty-nine".