3993799566 has 16 divisors (see below), whose sum is σ = 8028987984. Its totient is φ = 1324368384.

The previous prime is 3993799553. The next prime is 3993799591. The reversal of 3993799566 is 6659973993.

3993799566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 3993799497 and 3993799506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1723281 + ... + 1725596.

It is an arithmetic number, because the mean of its divisors is an integer number (501811749).

Almost surely, 2^3993799566 is an apocalyptic number.

3993799566 is an abundant number, since it is smaller than the sum of its proper divisors (4035188418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3993799566 is a wasteful number, since it uses less digits than its factorization.

3993799566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3449075.

The product of its digits is 74401740, while the sum is 66.

The square root of 3993799566 is about 63196.5154577371. The cubic root of 3993799566 is about 1586.5804131744.

The spelling of 3993799566 in words is "three billion, nine hundred ninety-three million, seven hundred ninety-nine thousand, five hundred sixty-six".