6650865126 has 80 divisors (see below), whose sum is σ = 15393685824. Its totient is φ = 2144920176.

The previous prime is 6650865121. The next prime is 6650865139. The reversal of 6650865126 is 6215680566.

It is a happy number.

6650865126 is a `hidden beast` number, since 6 + 6 + 50 + 86 + 512 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6650865121) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 740901 + ... + 749823.

Almost surely, 2^6650865126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6650865126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7696842912).

6650865126 is an abundant number, since it is smaller than the sum of its proper divisors (8742820698).

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

6650865126 is a wasteful number, since it uses less digits than its factorization.

6650865126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9087 (or 9078 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The square root of 6650865126 is about 81552.8364068350. The cubic root of 6650865126 is about 1880.5838994744.

The spelling of 6650865126 in words is "six billion, six hundred fifty million, eight hundred sixty-five thousand, one hundred twenty-six".