6678778 has 8 divisors (see below), whose sum is σ = 10030068. Its totient is φ = 3335424.

The previous prime is 6678767. The next prime is 6678779. The reversal of 6678778 is 8778766.

It can be written as a sum of positive squares in 2 ways, for example, as 6671889 + 6889 = 2583^2 + 83^2 .

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

It is not an unprimeable number, because it can be changed into a prime (6678779) 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, 1050 + ... + 3802.

Almost surely, 2^6678778 is an apocalyptic number.

6678778 is a deficient number, since it is larger than the sum of its proper divisors (3351290).

6678778 is a wasteful number, since it uses less digits than its factorization.

6678778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3968.

The product of its digits is 790272, while the sum is 49.

The square root of 6678778 is about 2584.3331828539. Note that the first 3 decimals coincide. The cubic root of 6678778 is about 188.3211088384.

The spelling of 6678778 in words is "six million, six hundred seventy-eight thousand, seven hundred seventy-eight".