1660345500 has 192 divisors, whose sum is σ = 5389203456. Its totient is φ = 393760000.

The previous prime is 1660345481. The next prime is 1660345537. The reversal of 1660345500 is 55430661.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 774430 + ... + 776570.

It is an arithmetic number, because the mean of its divisors is an integer number (28068768).

Almost surely, 2^1660345500 is an apocalyptic number.

1660345500 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 1660345500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2694601728).

1660345500 is an abundant number, since it is smaller than the sum of its proper divisors (3728857956).

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

1660345500 is a wasteful number, since it uses less digits than its factorization.

1660345500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221 (or 2209 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 1660345500 is about 40747.3373363217. The cubic root of 1660345500 is about 1184.1302881567.

The spelling of 1660345500 in words is "one billion, six hundred sixty million, three hundred forty-five thousand, five hundred".