6665600 has 48 divisors (see below), whose sum is σ = 16474020. Its totient is φ = 2664960.

The previous prime is 6665597. The next prime is 6665611. The reversal of 6665600 is 65666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2159 + ... + 4241.

Almost surely, 2^6665600 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6665600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8237010).

6665600 is an abundant number, since it is smaller than the sum of its proper divisors (9808420).

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

6665600 is a wasteful number, since it uses less digits than its factorization.

6665600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2107 (or 2090 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 6665600 is about 2581.7823300968. The cubic root of 6665600 is about 188.1971675232.

The spelling of 6665600 in words is "six million, six hundred sixty-five thousand, six hundred".