1668350016 has 84 divisors (see below), whose sum is σ = 4802428800. Its totient is φ = 553744128.

The previous prime is 1668349997. The next prime is 1668350039. The reversal of 1668350016 is 6100538661.

It is a happy number.

1668350016 is a `hidden beast` number, since 1 + 66 + 83 + 500 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131605 + ... + 143723.

Almost surely, 2^1668350016 is an apocalyptic number.

1668350016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1668350016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2401214400).

1668350016 is an abundant number, since it is smaller than the sum of its proper divisors (3134078784).

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

1668350016 is a wasteful number, since it uses less digits than its factorization.

1668350016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12376 (or 12363 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1668350016 is about 40845.4405778662. The cubic root of 1668350016 is about 1186.0301334496.

Adding to 1668350016 its reverse (6100538661), we get a palindrome (7768888677).

The spelling of 1668350016 in words is "one billion, six hundred sixty-eight million, three hundred fifty thousand, sixteen".