6681642 has 32 divisors (see below), whose sum is σ = 14805504. Its totient is φ = 1993200.

The previous prime is 6681637. The next prime is 6681671. The reversal of 6681642 is 2461866.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3667 + ... + 5177.

It is an arithmetic number, because the mean of its divisors is an integer number (462672).

Almost surely, 2^6681642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6681642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7402752).

6681642 is an abundant number, since it is smaller than the sum of its proper divisors (8123862).

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

6681642 is a wasteful number, since it uses less digits than its factorization.

6681642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594.

The product of its digits is 13824, while the sum is 33.

The square root of 6681642 is about 2584.8872315828. The cubic root of 6681642 is about 188.3480236711.

The spelling of 6681642 in words is "six million, six hundred eighty-one thousand, six hundred forty-two".