6681213 has 48 divisors (see below), whose sum is σ = 12460032. Its totient is φ = 3348000.

The previous prime is 6681209. The next prime is 6681239. The reversal of 6681213 is 3121866.

It is not a de Polignac number, because 6681213 - 2² = 6681209 is a prime.

6681213 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6681203) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21328 + ... + 21638.

It is an arithmetic number, because the mean of its divisors is an integer number (259584).

Almost surely, 2^6681213 is an apocalyptic number.

6681213 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

6681213 is a deficient number, since it is larger than the sum of its proper divisors (5778819).

6681213 is a wasteful number, since it uses less digits than its factorization.

6681213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 363 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 6681213 is about 2584.8042479074. The cubic root of 6681213 is about 188.3439925746.

It can be divided in two parts, 668 and 1213, that added together give a palindrome (1881).

The spelling of 6681213 in words is "six million, six hundred eighty-one thousand, two hundred thirteen".