1660516500 has 96 divisors (see below), whose sum is σ = 4926894336. Its totient is φ = 434428800.

The previous prime is 1660516499. The next prime is 1660516511. The reversal of 1660516500 is 56150661.

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 31 ways as a sum of consecutive naturals, for example, 69057 + ... + 89943.

It is an arithmetic number, because the mean of its divisors is an integer number (51321816).

Almost surely, 2^1660516500 is an apocalyptic number.

1660516500 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 1660516500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2463447168).

1660516500 is an abundant number, since it is smaller than the sum of its proper divisors (3266377836).

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

1660516500 is a wasteful number, since it uses less digits than its factorization.

1660516500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20962 (or 20950 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 1660516500 is about 40749.4355789132. The cubic root of 1660516500 is about 1184.1709381958.

The spelling of 1660516500 in words is "one billion, six hundred sixty million, five hundred sixteen thousand, five hundred".