1668439552304 has 160 divisors (see below), whose sum is σ = 3947633049600. Its totient is φ = 667190442240.

The previous prime is 1668439552267. The next prime is 1668439552337. The reversal of 1668439552304 is 4032559348661.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a self number, because there is not a number n which added to its sum of digits gives 1668439552304.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164227577 + ... + 164237735.

It is an arithmetic number, because the mean of its divisors is an integer number (24672706560).

Almost surely, 2^{1668439552304} is an apocalyptic number.

1668439552304 is a gapful number since it is divisible by the number (14) 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 1668439552304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1973816524800).

1668439552304 is an abundant number, since it is smaller than the sum of its proper divisors (2279193497296).

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

1668439552304 is a wasteful number, since it uses less digits than its factorization.

1668439552304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11351 (or 11345 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 56.

The spelling of 1668439552304 in words is "one trillion, six hundred sixty-eight billion, four hundred thirty-nine million, five hundred fifty-two thousand, three hundred four".