4042666778 has 8 divisors (see below), whose sum is σ = 6064392180. Its totient is φ = 2021202720.

The previous prime is 4042666777. The next prime is 4042666813. The reversal of 4042666778 is 8776662404.

It can be written as a sum of positive squares in 2 ways, for example, as 4040254969 + 2411809 = 63563^2 + 1553^2 .

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 (4042666777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20513 + ... + 92228.

Almost surely, 2^4042666778 is an apocalyptic number.

4042666778 is a deficient number, since it is larger than the sum of its proper divisors (2021725402).

4042666778 is a wasteful number, since it uses less digits than its factorization.

4042666778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130672.

The product of its (nonzero) digits is 2709504, while the sum is 50.

The square root of 4042666778 is about 63581.9689691975. The cubic root of 4042666778 is about 1593.0252094180.

The spelling of 4042666778 in words is "four billion, forty-two million, six hundred sixty-six thousand, seven hundred seventy-eight".