3818811566 has 8 divisors (see below), whose sum is σ = 5732658264. Its totient is φ = 1907925480.

The previous prime is 3818811511. The next prime is 3818811599. The reversal of 3818811566 is 6651188183.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 3818811566.

It is a congruent 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, 736925 + ... + 742088.

It is an arithmetic number, because the mean of its divisors is an integer number (716582283).

Almost surely, 2^3818811566 is an apocalyptic number.

3818811566 is a deficient number, since it is larger than the sum of its proper divisors (1913846698).

3818811566 is a wasteful number, since it uses less digits than its factorization.

3818811566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480306.

The product of its digits is 276480, while the sum is 47.

The square root of 3818811566 is about 61796.5336082858. The cubic root of 3818811566 is about 1563.0615373129.

The spelling of 3818811566 in words is "three billion, eight hundred eighteen million, eight hundred eleven thousand, five hundred sixty-six".