6665500 has 24 divisors (see below), whose sum is σ = 14558544. Its totient is φ = 2666000.

The previous prime is 6665497. The next prime is 6665537. The reversal of 6665500 is 55666.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6166 + ... + 7165.

It is an arithmetic number, because the mean of its divisors is an integer number (606606).

Almost surely, 2^6665500 is an apocalyptic number.

It is an amenable number.

6665500 is an abundant number, since it is smaller than the sum of its proper divisors (7893044).

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

6665500 is a wasteful number, since it uses less digits than its factorization.

6665500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13350 (or 13338 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 6665500 is about 2581.7629635580. The cubic root of 6665500 is about 188.1962263820.

The spelling of 6665500 in words is "six million, six hundred sixty-five thousand, five hundred".