1668998368 has 48 divisors (see below), whose sum is σ = 3380940864. Its totient is φ = 810432000.

The previous prime is 1668998347. The next prime is 1668998377. The reversal of 1668998368 is 8638998661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 888246 + ... + 890122.

It is an arithmetic number, because the mean of its divisors is an integer number (70436268).

Almost surely, 2^1668998368 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 1668998368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1690470432).

1668998368 is an abundant number, since it is smaller than the sum of its proper divisors (1711942496).

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

1668998368 is a wasteful number, since it uses less digits than its factorization.

1668998368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675 (or 2667 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 64.

The square root of 1668998368 is about 40853.3764577666. The cubic root of 1668998368 is about 1186.1837513779.

The spelling of 1668998368 in words is "one billion, six hundred sixty-eight million, nine hundred ninety-eight thousand, three hundred sixty-eight".