1668506480 has 160 divisors (see below), whose sum is σ = 4393968768. Its totient is φ = 585728000.

The previous prime is 1668506471. The next prime is 1668506509. The reversal of 1668506480 is 846058661.

It is a congruent number.

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, 1281830 + ... + 1283130.

Almost surely, 2^1668506480 is an apocalyptic number.

1668506480 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 1668506480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2196984384).

1668506480 is an abundant number, since it is smaller than the sum of its proper divisors (2725462288).

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

1668506480 is a wasteful number, since it uses less digits than its factorization.

1668506480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395 (or 1389 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 1668506480 is about 40847.3558507769. The cubic root of 1668506480 is about 1186.0672090465.

The spelling of 1668506480 in words is "one billion, six hundred sixty-eight million, five hundred six thousand, four hundred eighty".