1660706880 has 224 divisors, whose sum is σ = 6380902656. Its totient is φ = 357236736.

The previous prime is 1660706869. The next prime is 1660706893. The reversal of 1660706880 is 886070661.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 106972 + ... + 121508.

Almost surely, 2^1660706880 is an apocalyptic number.

1660706880 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 1660706880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3190451328).

1660706880 is an abundant number, since it is smaller than the sum of its proper divisors (4720195776).

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

1660706880 is a wasteful number, since it uses less digits than its factorization.

1660706880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14581 (or 14571 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 1660706880 is about 40751.7714952369. The cubic root of 1660706880 is about 1184.2161919563.

The spelling of 1660706880 in words is "one billion, six hundred sixty million, seven hundred six thousand, eight hundred eighty".