4778666 has 8 divisors (see below), whose sum is σ = 7589700. Its totient is φ = 2248768.

The previous prime is 4778663. The next prime is 4778693. The reversal of 4778666 is 6668774.

It can be written as a sum of positive squares in 2 ways, for example, as 4748041 + 30625 = 2179^2 + 175^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4778663) 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, 70241 + ... + 70308.

Almost surely, 2^4778666 is an apocalyptic number.

4778666 is a deficient number, since it is larger than the sum of its proper divisors (2811034).

4778666 is a wasteful number, since it uses less digits than its factorization.

4778666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140568.

The product of its digits is 338688, while the sum is 44.

The square root of 4778666 is about 2186.0160109203. The cubic root of 4778666 is about 168.4362481047.

The spelling of 4778666 in words is "four million, seven hundred seventy-eight thousand, six hundred sixty-six".