6606664 has 16 divisors (see below), whose sum is σ = 12815100. Its totient is φ = 3189312.

The previous prime is 6606653. The next prime is 6606673. The reversal of 6606664 is 4666066.

It can be written as a sum of positive squares in 2 ways, for example, as 6604900 + 1764 = 2570^2 + 42^2 .

It is a super-3 number, since 3×6606664³ (a number of 21 digits) contains 333 as substring.

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 3 ways as a sum of consecutive naturals, for example, 14007 + ... + 14470.

Almost surely, 2^6606664 is an apocalyptic number.

It is an amenable number.

6606664 is a deficient number, since it is larger than the sum of its proper divisors (6208436).

6606664 is a wasteful number, since it uses less digits than its factorization.

6606664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28512 (or 28508 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 6606664 is about 2570.3431677502. The cubic root of 6606664 is about 187.6408565275.

It can be divided in two parts, 66066 and 64, that multiplied together give a palindrome (4228224).

The spelling of 6606664 in words is "six million, six hundred six thousand, six hundred sixty-four".