4066378 has 4 divisors (see below), whose sum is σ = 6099570. Its totient is φ = 2033188.

The previous prime is 4066369. The next prime is 4066379. The reversal of 4066378 is 8736604.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3697929 + 368449 = 1923^2 + 607^2 .

It is a d-powerful number, because it can be written as 4⁹ + 0 + 6⁵ + 6⁸ + 3⁹ + 7 + 8⁷ .

It is not an unprimeable number, because it can be changed into a prime (4066379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1016593 + ... + 1016596.

Almost surely, 2^4066378 is an apocalyptic number.

4066378 is a deficient number, since it is larger than the sum of its proper divisors (2033192).

4066378 is a wasteful number, since it uses less digits than its factorization.

4066378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2033191.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 4066378 is about 2016.5262210048. The cubic root of 4066378 is about 159.6133633281.

It can be divided in two parts, 4066 and 378, that added together give a palindrome (4444).

The spelling of 4066378 in words is "four million, sixty-six thousand, three hundred seventy-eight".