6681630 has 32 divisors (see below), whose sum is σ = 16113024. Its totient is φ = 1773216.

The previous prime is 6681589. The next prime is 6681637. The reversal of 6681630 is 361866.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6681637) 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 15 ways as a sum of consecutive naturals, for example, 8097 + ... + 8883.

It is an arithmetic number, because the mean of its divisors is an integer number (503532).

Almost surely, 2^6681630 is an apocalyptic number.

6681630 is an abundant number, since it is smaller than the sum of its proper divisors (9431394).

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

6681630 is a wasteful number, since it uses less digits than its factorization.

6681630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 6681630 is about 2584.8849103974. The cubic root of 6681630 is about 188.3479109155.

The spelling of 6681630 in words is "six million, six hundred eighty-one thousand, six hundred thirty".