6641718 has 8 divisors (see below), whose sum is σ = 13283448. Its totient is φ = 2213904.

The previous prime is 6641717. The next prime is 6641729. The reversal of 6641718 is 8171466.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

6641718 is an admirable number.

It is a super-2 number, since 2×6641718² = 88224835983048, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6641717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553471 + ... + 553482.

It is an arithmetic number, because the mean of its divisors is an integer number (1660431).

Almost surely, 2^6641718 is an apocalyptic number.

6641718 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6641718 is a wasteful number, since it uses less digits than its factorization.

6641718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106958.

The product of its digits is 8064, while the sum is 33.

The square root of 6641718 is about 2577.1530804359. The cubic root of 6641718 is about 187.9721363564.

The spelling of 6641718 in words is "six million, six hundred forty-one thousand, seven hundred eighteen".