6665680 has 40 divisors (see below), whose sum is σ = 17713152. Its totient is φ = 2285184.

The previous prime is 6665671. The next prime is 6665689. The reversal of 6665680 is 865666.

It is an interprime number because it is at equal distance from previous prime (6665671) and next prime (6665689).

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6665689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5392 + ... + 6511.

Almost surely, 2^6665680 is an apocalyptic number.

It is an amenable number.

6665680 is an abundant number, since it is smaller than the sum of its proper divisors (11047472).

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

6665680 is a wasteful number, since it uses less digits than its factorization.

6665680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11923 (or 11917 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 6665680 is about 2581.7978232232. The cubic root of 6665680 is about 188.1979204293.

The spelling of 6665680 in words is "six million, six hundred sixty-five thousand, six hundred eighty".