6665718 has 8 divisors (see below), whose sum is σ = 13331448. Its totient is φ = 2221904.

The previous prime is 6665707. The next prime is 6665719. The reversal of 6665718 is 8175666.

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

6665718 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6665719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555471 + ... + 555482.

It is an arithmetic number, because the mean of its divisors is an integer number (1666431).

Almost surely, 2^6665718 is an apocalyptic number.

6665718 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.

6665718 is a wasteful number, since it uses less digits than its factorization.

6665718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110958.

The product of its digits is 60480, while the sum is 39.

The square root of 6665718 is about 2581.8051824257. The cubic root of 6665718 is about 188.1982780576.

The spelling of 6665718 in words is "six million, six hundred sixty-five thousand, seven hundred eighteen".