4066820823 has 16 divisors (see below), whose sum is σ = 5875372160. Its totient is φ = 2487301344.

The previous prime is 4066820789. The next prime is 4066820833. The reversal of 4066820823 is 3280286604.

It is not a de Polignac number, because 4066820823 - 2⁸ = 4066820567 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4066820833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313513 + ... + 326226.

It is an arithmetic number, because the mean of its divisors is an integer number (367210760).

Almost surely, 2^4066820823 is an apocalyptic number.

4066820823 is a deficient number, since it is larger than the sum of its proper divisors (1808551337).

4066820823 is a wasteful number, since it uses less digits than its factorization.

4066820823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639918.

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 4066820823 is about 63771.6302363363. The cubic root of 4066820823 is about 1596.1915701008.

The spelling of 4066820823 in words is "four billion, sixty-six million, eight hundred twenty thousand, eight hundred twenty-three".