6657555620 has 24 divisors (see below), whose sum is σ = 14588731584. Its totient is φ = 2547238496.

The previous prime is 6657555617. The next prime is 6657555631. The reversal of 6657555620 is 265557566.

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, 7236014 + ... + 7236933.

It is an arithmetic number, because the mean of its divisors is an integer number (607863816).

Almost surely, 2^6657555620 is an apocalyptic number.

It is an amenable number.

6657555620 is an abundant number, since it is smaller than the sum of its proper divisors (7931175964).

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

6657555620 is a wasteful number, since it uses less digits than its factorization.

6657555620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14472979 (or 14472977 counting only the distinct ones).

The product of its (nonzero) digits is 1890000, while the sum is 47.

The square root of 6657555620 is about 81593.8454786879. The cubic root of 6657555620 is about 1881.2142845653.

The spelling of 6657555620 in words is "six billion, six hundred fifty-seven million, five hundred fifty-five thousand, six hundred twenty".