1660045000 has 40 divisors (see below), whose sum is σ = 3889497150. Its totient is φ = 664016000.

The previous prime is 1660044961. The next prime is 1660045001. The reversal of 1660045000 is 5400661.

It can be written as a sum of positive squares in 5 ways, for example, as 34503876 + 1625541124 = 5874^2 + 40318^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1660045001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 161005 + ... + 171004.

Almost surely, 2^1660045000 is an apocalyptic number.

1660045000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1660045000 is an abundant number, since it is smaller than the sum of its proper divisors (2229452150).

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

1660045000 is an equidigital number, since it uses as much as digits as its factorization.

1660045000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332035 (or 332016 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1660045000 is about 40743.6498119646. The cubic root of 1660045000 is about 1184.0588466765.

Adding to 1660045000 its reverse (5400661), we get a palindrome (1665445661).

The spelling of 1660045000 in words is "one billion, six hundred sixty million, forty-five thousand".