1660845000 has 160 divisors (see below), whose sum is σ = 5220578880. Its totient is φ = 440160000.

The previous prime is 1660844981. The next prime is 1660845001. The reversal of 1660845000 is 5480661.

It is a super-2 number, since 2×1660845000² = 5516812228050000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1660845001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3944790 + ... + 3945210.

It is an arithmetic number, because the mean of its divisors is an integer number (32628618).

Almost surely, 2^1660845000 is an apocalyptic number.

1660845000 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 1660845000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2610289440).

1660845000 is an abundant number, since it is smaller than the sum of its proper divisors (3559733880).

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

1660845000 is a wasteful number, since it uses less digits than its factorization.

1660845000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713 (or 694 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 1660845000 is about 40753.4661102586. The cubic root of 1660845000 is about 1184.2490212308.

The spelling of 1660845000 in words is "one billion, six hundred sixty million, eight hundred forty-five thousand".