6665624 has 32 divisors (see below), whose sum is σ = 14674080. Its totient is φ = 2778624.

The previous prime is 6665623. The next prime is 6665627. The reversal of 6665624 is 4265666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6665623) 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, 464 + ... + 3680.

It is an arithmetic number, because the mean of its divisors is an integer number (458565).

Almost surely, 2^6665624 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 6665624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7337040).

6665624 is an abundant number, since it is smaller than the sum of its proper divisors (8008456).

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

6665624 is a wasteful number, since it uses less digits than its factorization.

6665624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3267 (or 3263 counting only the distinct ones).

The product of its digits is 51840, while the sum is 35.

The square root of 6665624 is about 2581.7869780445. The cubic root of 6665624 is about 188.1973933956.

The spelling of 6665624 in words is "six million, six hundred sixty-five thousand, six hundred twenty-four".