6681432 has 16 divisors (see below), whose sum is σ = 16703640. Its totient is φ = 2227136.

The previous prime is 6681427. The next prime is 6681439. The reversal of 6681432 is 2341866.

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 6681432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6681439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139173 + ... + 139220.

Almost surely, 2^6681432 is an apocalyptic number.

It is an amenable number.

6681432 is an abundant number, since it is smaller than the sum of its proper divisors (10022208).

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

6681432 is a wasteful number, since it uses less digits than its factorization.

6681432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278402 (or 278398 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 6681432 is about 2584.8466105361. The cubic root of 6681432 is about 188.3460504287.

The spelling of 6681432 in words is "six million, six hundred eighty-one thousand, four hundred thirty-two".