6866909312 has 64 divisors (see below), whose sum is σ = 13845816600. Its totient is φ = 3392077824.

The previous prime is 6866909303. The next prime is 6866909321. The reversal of 6866909312 is 2139096686.

It is an interprime number because it is at equal distance from previous prime (6866909303) and next prime (6866909321).

It can be written as a sum of positive squares in 4 ways, for example, as 6563592256 + 303317056 = 81016^2 + 17416^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8049878 + ... + 8050730.

Almost surely, 2^6866909312 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 6866909312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6922908300).

6866909312 is an abundant number, since it is smaller than the sum of its proper divisors (6978907288).

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

6866909312 is a wasteful number, since it uses less digits than its factorization.

6866909312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553 (or 1541 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 50.

The square root of 6866909312 is about 82866.8167121195. The cubic root of 6866909312 is about 1900.7300345147.

The spelling of 6866909312 in words is "six billion, eight hundred sixty-six million, nine hundred nine thousand, three hundred twelve".