1668668148 has 144 divisors (see below), whose sum is σ = 5150228160. Its totient is φ = 465611328.

The previous prime is 1668668129. The next prime is 1668668153. The reversal of 1668668148 is 8418668661.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 1668668094 and 1668668103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 223890 + ... + 231222.

Almost surely, 2^1668668148 is an apocalyptic number.

1668668148 is a gapful number since it is divisible by the number (18) 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 1668668148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2575114080).

1668668148 is an abundant number, since it is smaller than the sum of its proper divisors (3481560012).

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

1668668148 is a wasteful number, since it uses less digits than its factorization.

1668668148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7403 (or 7388 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 54.

The square root of 1668668148 is about 40849.3347314249. The cubic root of 1668668148 is about 1186.1055153448.

The spelling of 1668668148 in words is "one billion, six hundred sixty-eight million, six hundred sixty-eight thousand, one hundred forty-eight".