6661716 has 12 divisors (see below), whose sum is σ = 15544032. Its totient is φ = 2220568.

The previous prime is 6661709. The next prime is 6661727. The reversal of 6661716 is 6171666.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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, 277560 + ... + 277583.

It is an arithmetic number, because the mean of its divisors is an integer number (1295336).

Almost surely, 2^6661716 is an apocalyptic number.

It is an amenable number.

6661716 is an abundant number, since it is smaller than the sum of its proper divisors (8882316).

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

6661716 is a wasteful number, since it uses less digits than its factorization.

6661716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555150 (or 555148 counting only the distinct ones).

The product of its digits is 9072, while the sum is 33.

The square root of 6661716 is about 2581.0300269466. The cubic root of 6661716 is about 188.1606066825.

The spelling of 6661716 in words is "six million, six hundred sixty-one thousand, seven hundred sixteen".