1668500016 has 20 divisors (see below), whose sum is σ = 4310291832. Its totient is φ = 556166656.

The previous prime is 1668499993. The next prime is 1668500033. The reversal of 1668500016 is 6100058661.

It is a self number, because there is not a number n which added to its sum of digits gives 1668500016.

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, 17380161 + ... + 17380256.

Almost surely, 2^1668500016 is an apocalyptic number.

1668500016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1668500016 is an abundant number, since it is smaller than the sum of its proper divisors (2641791816).

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

1668500016 is a wasteful number, since it uses less digits than its factorization.

1668500016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34760428 (or 34760422 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 1668500016 is about 40847.2767268517. The cubic root of 1668500016 is about 1186.0656773876.

Adding to 1668500016 its reverse (6100058661), we get a palindrome (7768558677).

The spelling of 1668500016 in words is "one billion, six hundred sixty-eight million, five hundred thousand, sixteen".