4378663 has 4 divisors (see below), whose sum is σ = 4408200. Its totient is φ = 4349128.

The previous prime is 4378631. The next prime is 4378697. The reversal of 4378663 is 3668734.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 4378663 - 2⁵ = 4378631 is a prime.

It is a d-powerful number, because it can be written as 4 + 3⁶ + 7⁷ + 8³ + 6⁷ + 6⁸ + 3¹³ .

It is a Duffinian number.

4378663 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4378463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14545 + ... + 14842.

It is an arithmetic number, because the mean of its divisors is an integer number (1102050).

Almost surely, 2^4378663 is an apocalyptic number.

4378663 is a deficient number, since it is larger than the sum of its proper divisors (29537).

4378663 is a wasteful number, since it uses less digits than its factorization.

4378663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29536.

The product of its digits is 72576, while the sum is 37.

The square root of 4378663 is about 2092.5255076104. The cubic root of 4378663 is about 163.5989481703.

It can be divided in two parts, 4378 and 663, that added together give a square (5041 = 71²).

The spelling of 4378663 in words is "four million, three hundred seventy-eight thousand, six hundred sixty-three".