6766778 has 8 divisors (see below), whose sum is σ = 10366272. Its totient is φ = 3311356.

The previous prime is 6766777. The next prime is 6766789. The reversal of 6766778 is 8776676.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (47).

It is not an unprimeable number, because it can be changed into a prime (6766777) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 35900 + ... + 36087.

It is an arithmetic number, because the mean of its divisors is an integer number (1295784).

Almost surely, 2^6766778 is an apocalyptic number.

6766778 is a deficient number, since it is larger than the sum of its proper divisors (3599494).

6766778 is a wasteful number, since it uses less digits than its factorization.

6766778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72036.

The product of its digits is 592704, while the sum is 47.

The square root of 6766778 is about 2601.3031349691. The cubic root of 6766778 is about 189.1446127804.

The spelling of 6766778 in words is "six million, seven hundred sixty-six thousand, seven hundred seventy-eight".