3993666775 has 24 divisors (see below), whose sum is σ = 5992518240. Its totient is φ = 2577423360.

The previous prime is 3993666757. The next prime is 3993666779. The reversal of 3993666775 is 5776663993.

3993666775 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3993666775 - 2¹⁷ = 3993535703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3993666779) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 668230 + ... + 674179.

It is an arithmetic number, because the mean of its divisors is an integer number (249688260).

Almost surely, 2^3993666775 is an apocalyptic number.

3993666775 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3993666775 is a deficient number, since it is larger than the sum of its proper divisors (1998851465).

3993666775 is a wasteful number, since it uses less digits than its factorization.

3993666775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342443 (or 1342438 counting only the distinct ones).

The product of its digits is 38578680, while the sum is 61.

The square root of 3993666775 is about 63195.4648293689. The cubic root of 3993666775 is about 1586.5628287555.

The spelling of 3993666775 in words is "three billion, nine hundred ninety-three million, six hundred sixty-six thousand, seven hundred seventy-five".