1668426480 has 540 divisors, whose sum is σ = 6931545192. Its totient is φ = 358525440.

The previous prime is 1668426439. The next prime is 1668426491. The reversal of 1668426480 is 846248661.

1668426480 is a `hidden beast` number, since 166 + 8 + 4 + 2 + 6 + 480 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 12736015 + ... + 12736145.

Almost surely, 2^1668426480 is an apocalyptic number.

1668426480 is a gapful number since it is divisible by the number (10) 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 1668426480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3465772596).

1668426480 is an abundant number, since it is smaller than the sum of its proper divisors (5263118712).

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

1668426480 is a wasteful number, since it uses less digits than its factorization.

1668426480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The square root of 1668426480 is about 40846.3765834866. The cubic root of 1668426480 is about 1186.0482525937.

The spelling of 1668426480 in words is "one billion, six hundred sixty-eight million, four hundred twenty-six thousand, four hundred eighty".