1660539090 has 96 divisors (see below), whose sum is σ = 4838477184. Its totient is φ = 357212160.

The previous prime is 1660539077. The next prime is 1660539113. The reversal of 1660539090 is 909350661.

1660539090 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47010 + ... + 74370.

It is an arithmetic number, because the mean of its divisors is an integer number (50400804).

Almost surely, 2^1660539090 is an apocalyptic number.

1660539090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1660539090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2419238592).

1660539090 is an abundant number, since it is smaller than the sum of its proper divisors (3177938094).

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

1660539090 is a wasteful number, since it uses less digits than its factorization.

1660539090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27412 (or 27395 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 1660539090 is about 40749.7127597238. The cubic root of 1660539090 is about 1184.1763080712.

The spelling of 1660539090 in words is "one billion, six hundred sixty million, five hundred thirty-nine thousand, ninety".