6740649 has 12 divisors (see below), whose sum is σ = 10249200. Its totient is φ = 4257144.

The previous prime is 6740647. The next prime is 6740651. The reversal of 6740649 is 9460476.

6740649 is a `hidden beast` number, since 6 + 7 + 4 + 0 + 649 = 666.

It is an interprime number because it is at equal distance from previous prime (6740647) and next prime (6740651).

It is not a de Polignac number, because 6740649 - 2¹ = 6740647 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6740647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19539 + ... + 19880.

It is an arithmetic number, because the mean of its divisors is an integer number (854100).

Almost surely, 2^6740649 is an apocalyptic number.

It is an amenable number.

6740649 is a deficient number, since it is larger than the sum of its proper divisors (3508551).

6740649 is a wasteful number, since it uses less digits than its factorization.

6740649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39444 (or 39441 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 6740649 is about 2596.2759868704. The cubic root of 6740649 is about 188.9008466222.

The spelling of 6740649 in words is "six million, seven hundred forty thousand, six hundred forty-nine".