6466978 has 16 divisors (see below), whose sum is σ = 11119104. Its totient is φ = 2763360.

The previous prime is 6466969. The next prime is 6466991. The reversal of 6466978 is 8796646.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8118 + ... + 8878.

It is an arithmetic number, because the mean of its divisors is an integer number (694944).

Almost surely, 2^6466978 is an apocalyptic number.

6466978 is a deficient number, since it is larger than the sum of its proper divisors (4652126).

6466978 is a wasteful number, since it uses less digits than its factorization.

6466978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377.

The product of its digits is 435456, while the sum is 46.

The square root of 6466978 is about 2543.0253636171. The cubic root of 6466978 is about 186.3089827154.

The spelling of 6466978 in words is "six million, four hundred sixty-six thousand, nine hundred seventy-eight".