6660516020 has 24 divisors (see below), whose sum is σ = 14809854024. Its totient is φ = 2507488256.

The previous prime is 6660516017. The next prime is 6660516053. The reversal of 6660516020 is 206150666.

It can be written as a sum of positive squares in 4 ways, for example, as 467770384 + 6192745636 = 21628^2 + 78694^2 .

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9794537 + ... + 9795216.

It is an arithmetic number, because the mean of its divisors is an integer number (617077251).

Almost surely, 2^6660516020 is an apocalyptic number.

It is an amenable number.

6660516020 is an abundant number, since it is smaller than the sum of its proper divisors (8149338004).

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

6660516020 is a wasteful number, since it uses less digits than its factorization.

6660516020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19589779 (or 19589777 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 6660516020 is about 81611.9845365863. The cubic root of 6660516020 is about 1881.4930816602.

Adding to 6660516020 its reverse (206150666), we get a palindrome (6866666686).

The spelling of 6660516020 in words is "six billion, six hundred sixty million, five hundred sixteen thousand, twenty".