6660612140 has 72 divisors (see below), whose sum is σ = 17522566992. Its totient is φ = 2107969920.

The previous prime is 6660612139. The next prime is 6660612157. The reversal of 6660612140 is 412160666.

It is a junction number, because it is equal to n+sod(n) for n = 6660612097 and 6660612106.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 248666 + ... + 274145.

It is an arithmetic number, because the mean of its divisors is an integer number (243368986).

Almost surely, 2^6660612140 is an apocalyptic number.

It is an amenable number.

6660612140 is an abundant number, since it is smaller than the sum of its proper divisors (10861954852).

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

6660612140 is a wasteful number, since it uses less digits than its factorization.

6660612140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522847 (or 522838 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 6660612140 is about 81612.5734185609. The cubic root of 6660612140 is about 1881.5021324227.

The spelling of 6660612140 in words is "six billion, six hundred sixty million, six hundred twelve thousand, one hundred forty".