6665107540 has 96 divisors (see below), whose sum is σ = 17353131264. Its totient is φ = 2093921280.

The previous prime is 6665107531. The next prime is 6665107577. The reversal of 6665107540 is 457015666.

It is a junction number, because it is equal to n+sod(n) for n = 6665107493 and 6665107502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 235975 + ... + 262705.

It is an arithmetic number, because the mean of its divisors is an integer number (180761784).

Almost surely, 2^6665107540 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 6665107540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8676565632).

6665107540 is an abundant number, since it is smaller than the sum of its proper divisors (10688023724).

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

6665107540 is a wasteful number, since it uses less digits than its factorization.

6665107540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26897 (or 26895 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 6665107540 is about 81640.1098725375. The cubic root of 6665107540 is about 1881.9253268862.

The spelling of 6665107540 in words is "six billion, six hundred sixty-five million, one hundred seven thousand, five hundred forty".