3993711664 has 20 divisors (see below), whose sum is σ = 7831045656. Its totient is φ = 1972796672.

The previous prime is 3993711649. The next prime is 3993711677. The reversal of 3993711664 is 4661173993.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1502329 + ... + 1504984.

Almost surely, 2^3993711664 is an apocalyptic number.

It is an amenable number.

3993711664 is a deficient number, since it is larger than the sum of its proper divisors (3837333992).

3993711664 is a wasteful number, since it uses less digits than its factorization.

3993711664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3007404 (or 3007398 counting only the distinct ones).

The product of its digits is 734832, while the sum is 49.

The square root of 3993711664 is about 63195.8199883505. The cubic root of 3993711664 is about 1586.5687730798.

The spelling of 3993711664 in words is "three billion, nine hundred ninety-three million, seven hundred eleven thousand, six hundred sixty-four".