1668036216 has 128 divisors (see below), whose sum is σ = 5284661760. Its totient is φ = 426124800.

The previous prime is 1668036211. The next prime is 1668036241. The reversal of 1668036216 is 6126308661.

1668036216 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668036211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105330 + ... + 120126.

It is an arithmetic number, because the mean of its divisors is an integer number (41286420).

Almost surely, 2^1668036216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1668036216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2642330880).

1668036216 is an abundant number, since it is smaller than the sum of its proper divisors (3616625544).

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

1668036216 is a wasteful number, since it uses less digits than its factorization.

1668036216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14885 (or 14881 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 1668036216 is about 40841.5990872052. The cubic root of 1668036216 is about 1185.9557686403.

The spelling of 1668036216 in words is "one billion, six hundred sixty-eight million, thirty-six thousand, two hundred sixteen".