6624666 has 48 divisors (see below), whose sum is σ = 15279264. Its totient is φ = 2150064.

The previous prime is 6624659. The next prime is 6624671. The reversal of 6624666 is 6664266.

It is a super-2 number, since 2×6624666² = 87772399223112, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 6624666.

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 23 ways as a sum of consecutive naturals, for example, 20740 + ... + 21056.

It is an arithmetic number, because the mean of its divisors is an integer number (318318).

Almost surely, 2^6624666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6624666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7639632).

6624666 is an abundant number, since it is smaller than the sum of its proper divisors (8654598).

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

6624666 is a wasteful number, since it uses less digits than its factorization.

6624666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377 (or 365 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 6624666 is about 2573.8426525334. The cubic root of 6624666 is about 187.8111314330.

The spelling of 6624666 in words is "six million, six hundred twenty-four thousand, six hundred sixty-six".