1668480 has 128 divisors (see below), whose sum is σ = 5875200. Its totient is φ = 399360.

The previous prime is 1668479. The next prime is 1668481. The reversal of 1668480 is 848661.

It is an interprime number because it is at equal distance from previous prime (1668479) and next prime (1668481).

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21081 + ... + 21159.

It is an arithmetic number, because the mean of its divisors is an integer number (45900).

2^1668480 is an apocalyptic number.

1668480 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 1668480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2937600).

1668480 is an abundant number, since it is smaller than the sum of its proper divisors (4206720).

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

1668480 is a wasteful number, since it uses less digits than its factorization.

1668480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 1668480 is about 1291.6965587939. The cubic root of 1668480 is about 118.6060934528.

It can be divided in two parts, 166 and 8480, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 1668480 in words is "one million, six hundred sixty-eight thousand, four hundred eighty".