6665604 has 24 divisors (see below), whose sum is σ = 16967328. Its totient is φ = 2019840.

The previous prime is 6665597. The next prime is 6665611. The reversal of 6665604 is 4065666.

It is an interprime number because it is at equal distance from previous prime (6665597) and next prime (6665611).

It is a Harshad number since it is a multiple of its sum of digits (33).

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 7 ways as a sum of consecutive naturals, for example, 25117 + ... + 25380.

It is an arithmetic number, because the mean of its divisors is an integer number (706972).

Almost surely, 2^6665604 is an apocalyptic number.

It is an amenable number.

6665604 is an abundant number, since it is smaller than the sum of its proper divisors (10301724).

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

6665604 is a wasteful number, since it uses less digits than its factorization.

6665604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50515 (or 50513 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 6665604 is about 2581.7831047553. The cubic root of 6665604 is about 188.1972051686.

The spelling of 6665604 in words is "six million, six hundred sixty-five thousand, six hundred four".