6678781466 has 32 divisors (see below), whose sum is σ = 12760882560. Its totient is φ = 2552173056.

The previous prime is 6678781433. The next prime is 6678781489. The reversal of 6678781466 is 6641878766.

It is a super-2 number, since 2×6678781466² = 89212243741170218312, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 733955 + ... + 742998.

It is an arithmetic number, because the mean of its divisors is an integer number (398777580).

Almost surely, 2^6678781466 is an apocalyptic number.

6678781466 is a deficient number, since it is larger than the sum of its proper divisors (6082101094).

6678781466 is a wasteful number, since it uses less digits than its factorization.

6678781466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1476998.

The product of its digits is 16257024, while the sum is 59.

The square root of 6678781466 is about 81723.8121112813. The cubic root of 6678781466 is about 1883.2114141523.

The spelling of 6678781466 in words is "six billion, six hundred seventy-eight million, seven hundred eighty-one thousand, four hundred sixty-six".