6681490 has 16 divisors (see below), whose sum is σ = 12116952. Its totient is φ = 2652544.

The previous prime is 6681487. The next prime is 6681491. The reversal of 6681490 is 941866.

It can be written as a sum of positive squares in 4 ways, for example, as 4941729 + 1739761 = 2223^2 + 1319^2 .

It is not an unprimeable number, because it can be changed into a prime (6681491) 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 7 ways as a sum of consecutive naturals, for example, 1069 + ... + 3808.

Almost surely, 2^6681490 is an apocalyptic number.

6681490 is a deficient number, since it is larger than the sum of its proper divisors (5435462).

6681490 is a wasteful number, since it uses less digits than its factorization.

6681490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5021.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 6681490 is about 2584.8578297462. The cubic root of 6681490 is about 188.3465954236.

The spelling of 6681490 in words is "six million, six hundred eighty-one thousand, four hundred ninety".