6681402140 has 48 divisors (see below), whose sum is σ = 16274721792. Its totient is φ = 2256572736.

The previous prime is 6681402113. The next prime is 6681402179. The reversal of 6681402140 is 412041866.

It is a super-2 number, since 2×6681402140² = 89282269112793159200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6681402097 and 6681402106.

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, 346772 + ... + 365531.

It is an arithmetic number, because the mean of its divisors is an integer number (339056704).

Almost surely, 2^6681402140 is an apocalyptic number.

It is an amenable number.

6681402140 is an abundant number, since it is smaller than the sum of its proper divisors (9593319652).

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

6681402140 is a wasteful number, since it uses less digits than its factorization.

6681402140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712386 (or 712384 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 6681402140 is about 81739.8442621467. The cubic root of 6681402140 is about 1883.4576984903.

The spelling of 6681402140 in words is "six billion, six hundred eighty-one million, four hundred two thousand, one hundred forty".