6665385100 has 72 divisors (see below), whose sum is σ = 15791958000. Its totient is φ = 2421753600.

The previous prime is 6665385043. The next prime is 6665385127. The reversal of 6665385100 is 15835666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2142346 + ... + 2145454.

It is an arithmetic number, because the mean of its divisors is an integer number (219332750).

Almost surely, 2^6665385100 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6665385100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7895979000).

6665385100 is an abundant number, since it is smaller than the sum of its proper divisors (9126572900).

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

6665385100 is a wasteful number, since it uses less digits than its factorization.

6665385100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5083 (or 5076 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 6665385100 is about 81641.8097545614. The cubic root of 6665385100 is about 1881.9514499927.

The spelling of 6665385100 in words is "six billion, six hundred sixty-five million, three hundred eighty-five thousand, one hundred".