6657695312 has 60 divisors (see below), whose sum is σ = 13725607740. Its totient is φ = 3127799808.

The previous prime is 6657695311. The next prime is 6657695417. The reversal of 6657695312 is 2135967566.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 205750336 + 6451944976 = 14344^2 + 80324^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6657695311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5164364 + ... + 5165652.

It is an arithmetic number, because the mean of its divisors is an integer number (228760129).

Almost surely, 2^6657695312 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 6657695312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6862803870).

6657695312 is an abundant number, since it is smaller than the sum of its proper divisors (7067912428).

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

6657695312 is a wasteful number, since it uses less digits than its factorization.

6657695312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448 (or 2425 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 50.

The square root of 6657695312 is about 81594.7014946436. The cubic root of 6657695312 is about 1881.2274419844.

The spelling of 6657695312 in words is "six billion, six hundred fifty-seven million, six hundred ninety-five thousand, three hundred twelve".