6447755 has 4 divisors (see below), whose sum is σ = 7737312. Its totient is φ = 5158200.

The previous prime is 6447737. The next prime is 6447757. The reversal of 6447755 is 5577446.

6447755 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 6447755 - 2⁶ = 6447691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6447757) 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, 644771 + ... + 644780.

It is an arithmetic number, because the mean of its divisors is an integer number (1934328).

Almost surely, 2^6447755 is an apocalyptic number.

6447755 is a deficient number, since it is larger than the sum of its proper divisors (1289557).

6447755 is a wasteful number, since it uses less digits than its factorization.

6447755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289556.

The product of its digits is 117600, while the sum is 38.

The square root of 6447755 is about 2539.2429974305. The cubic root of 6447755 is about 186.1241992396.

The spelling of 6447755 in words is "six million, four hundred forty-seven thousand, seven hundred fifty-five".