6921681214 has 32 divisors (see below), whose sum is σ = 11953783296. Its totient is φ = 2944481760.

The previous prime is 6921681161. The next prime is 6921681241. The reversal of 6921681214 is 4121861296.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1758829 + ... + 1762759.

It is an arithmetic number, because the mean of its divisors is an integer number (373555728).

Almost surely, 2^6921681214 is an apocalyptic number.

6921681214 is a deficient number, since it is larger than the sum of its proper divisors (5032102082).

6921681214 is a wasteful number, since it uses less digits than its factorization.

6921681214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4840.

The product of its digits is 41472, while the sum is 40.

The square root of 6921681214 is about 83196.6418432860. The cubic root of 6921681214 is about 1905.7701975398.

The spelling of 6921681214 in words is "six billion, nine hundred twenty-one million, six hundred eighty-one thousand, two hundred fourteen".