6481778 has 8 divisors (see below), whose sum is σ = 9759360. Its totient is φ = 3228660.

The previous prime is 6481763. The next prime is 6481789. The reversal of 6481778 is 8771846.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5438 + ... + 6521.

It is an arithmetic number, because the mean of its divisors is an integer number (1219920).

Almost surely, 2^6481778 is an apocalyptic number.

6481778 is a deficient number, since it is larger than the sum of its proper divisors (3277582).

6481778 is a wasteful number, since it uses less digits than its factorization.

6481778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12232.

The product of its digits is 75264, while the sum is 41.

The square root of 6481778 is about 2545.9336205015. The cubic root of 6481778 is about 186.4510002158.

The spelling of 6481778 in words is "six million, four hundred eighty-one thousand, seven hundred seventy-eight".