6681540734012 has 24 divisors (see below), whose sum is σ = 12202476177696. Its totient is φ = 3195152345088.

The previous prime is 6681540734009. The next prime is 6681540734039. The reversal of 6681540734012 is 2104370451866.

It is a super-2 number, since 2×6681540734012² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3366053 + ... + 4969244.

It is an arithmetic number, because the mean of its divisors is an integer number (508436507404).

Almost surely, 2^{6681540734012} is an apocalyptic number.

It is an amenable number.

6681540734012 is a deficient number, since it is larger than the sum of its proper divisors (5520935443684).

6681540734012 is a wasteful number, since it uses less digits than its factorization.

6681540734012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8344037 (or 8344035 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 6681540734012 in words is "six trillion, six hundred eighty-one billion, five hundred forty million, seven hundred thirty-four thousand, twelve".