1665813480 has 64 divisors (see below), whose sum is σ = 5103786240. Its totient is φ = 434764032.

The previous prime is 1665813473. The next prime is 1665813529. The reversal of 1665813480 is 843185661.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142039 + ... + 153318.

It is an arithmetic number, because the mean of its divisors is an integer number (79746660).

Almost surely, 2^1665813480 is an apocalyptic number.

1665813480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1665813480 is an abundant number, since it is smaller than the sum of its proper divisors (3437972760).

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

1665813480 is a wasteful number, since it uses less digits than its factorization.

1665813480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295418 (or 295414 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 1665813480 is about 40814.3783488123. The cubic root of 1665813480 is about 1185.4287540353.

The spelling of 1665813480 in words is "one billion, six hundred sixty-five million, eight hundred thirteen thousand, four hundred eighty".