6660660920 has 32 divisors (see below), whose sum is σ = 15000707520. Its totient is φ = 2661736320.

The previous prime is 6660660893. The next prime is 6660660949. The reversal of 6660660920 is 290660666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36032 + ... + 120911.

It is an arithmetic number, because the mean of its divisors is an integer number (468772110).

Almost surely, 2^6660660920 is an apocalyptic number.

It is an amenable number.

6660660920 is an abundant number, since it is smaller than the sum of its proper divisors (8340046600).

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

6660660920 is a wasteful number, since it uses less digits than its factorization.

6660660920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158015 (or 158011 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 6660660920 is about 81612.8722690238. The cubic root of 6660660920 is about 1881.5067255666.

The spelling of 6660660920 in words is "six billion, six hundred sixty million, six hundred sixty thousand, nine hundred twenty".