1660288380 has 24 divisors (see below), whose sum is σ = 4648807632. Its totient is φ = 442743552.

The previous prime is 1660288363. The next prime is 1660288393. The reversal of 1660288380 is 838820661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13835677 + ... + 13835796.

It is an arithmetic number, because the mean of its divisors is an integer number (193700318).

Almost surely, 2^1660288380 is an apocalyptic number.

1660288380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1660288380 is an abundant number, since it is smaller than the sum of its proper divisors (2988519252).

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

1660288380 is a wasteful number, since it uses less digits than its factorization.

1660288380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27671485 (or 27671483 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 1660288380 is about 40746.6364255996. The cubic root of 1660288380 is about 1184.1167089955.

The spelling of 1660288380 in words is "one billion, six hundred sixty million, two hundred eighty-eight thousand, three hundred eighty".