1666060560 has 60 divisors (see below), whose sum is σ = 5595189132. Its totient is φ = 444282624.

The previous prime is 1666060519. The next prime is 1666060567. The reversal of 1666060560 is 650606661.

It can be written as a sum of positive squares in 2 ways, for example, as 989228304 + 676832256 = 31452^2 + 26016^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1666060567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1156267 + ... + 1157706.

Almost surely, 2^1666060560 is an apocalyptic number.

1666060560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1666060560 is an abundant number, since it is smaller than the sum of its proper divisors (3929128572).

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

1666060560 is a wasteful number, since it uses less digits than its factorization.

1666060560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2313992 (or 2313983 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 1666060560 is about 40817.4051110553. The cubic root of 1666060560 is about 1185.4873602878.

The spelling of 1666060560 in words is "one billion, six hundred sixty-six million, sixty thousand, five hundred sixty".