6921366012 has 108 divisors (see below), whose sum is σ = 19475179360. Its totient is φ = 2070731520.

The previous prime is 6921365987. The next prime is 6921366017. The reversal of 6921366012 is 2106631296.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6921366017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 334068 + ... + 354180.

Almost surely, 2^6921366012 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 6921366012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9737589680).

6921366012 is an abundant number, since it is smaller than the sum of its proper divisors (12553813348).

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

6921366012 is a wasteful number, since it uses less digits than its factorization.

6921366012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20224 (or 20208 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 6921366012 is about 83194.7475024716. The cubic root of 6921366012 is about 1905.7412685519.

The spelling of 6921366012 in words is "six billion, nine hundred twenty-one million, three hundred sixty-six thousand, twelve".