6447866 has 8 divisors (see below), whose sum is σ = 10092384. Its totient is φ = 3083740.

The previous prime is 6447853. The next prime is 6447899. The reversal of 6447866 is 6687446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70040 + ... + 70131.

It is an arithmetic number, because the mean of its divisors is an integer number (1261548).

Almost surely, 2^6447866 is an apocalyptic number.

6447866 is a deficient number, since it is larger than the sum of its proper divisors (3644518).

6447866 is a wasteful number, since it uses less digits than its factorization.

6447866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140196.

The product of its digits is 193536, while the sum is 41.

The square root of 6447866 is about 2539.2648542442. The cubic root of 6447866 is about 186.1252672945.

The spelling of 6447866 in words is "six million, four hundred forty-seven thousand, eight hundred sixty-six".