6630778 has 24 divisors (see below), whose sum is σ = 12623904. Its totient is φ = 2583000.

The previous prime is 6630773. The next prime is 6630779. The reversal of 6630778 is 8770366.

It is a super-3 number, since 3×6630778³ (a number of 21 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (6630773) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1998 + ... + 4153.

It is an arithmetic number, because the mean of its divisors is an integer number (525996).

Almost surely, 2^6630778 is an apocalyptic number.

6630778 is a deficient number, since it is larger than the sum of its proper divisors (5993126).

6630778 is a wasteful number, since it uses less digits than its factorization.

6630778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6178 (or 6171 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 6630778 is about 2575.0297085665. The cubic root of 6630778 is about 187.8688726481.

The spelling of 6630778 in words is "six million, six hundred thirty thousand, seven hundred seventy-eight".